Uncritical Thinking Definition Wikipedia

Sir Karl Raimund Popper (28 July1902 – 17 September1994) was an Austrian and British philosopher and a professor at the London School of Economics. He is considered one of the most influential philosophers of science of the 20th century, and also wrote extensively on social and political philosophy.


  • You can choose whatever name you like for the two types of government. I personally call the type of government which can be removed without violence "democracy", and the other "tyranny".
    • As quoted in Freedom: A New Analysis (1954) by Maurice William Cranston, p. 112
  • Piecemeal social engineering resembles physical engineering in regarding the ends as beyond the province of technology. (All that technology may say about ends is whether they are compatible with each other or realizable.)
    • The Poverty of Historicism (1957) Ch. 22 The Unholy Alliance with Utopianism
  • If we are uncritical we shall always find what we want: we shall look for, and find, confirmations, and we shall look away from, and not see, whatever might be dangerous to our pet theories. In this way it is only too easy to obtain what appears to be overwhelming evidence in favor of a theory which, if approached critically, would have been refuted.
    • The Poverty of Historicism (1957) Ch. 29 The Unity of Method
  • Whenever a theory appears to you as the only possible one, take this as a sign that you have neither understood the theory nor the problem which it was intended to solve.
    • Objective Knowledge: An Evolutionary Approach (1972)
  • For it was my master who taught me not only how very little I knew but also that any wisdom to which I might ever aspire could consist only in realizing more fully the infinity of my ignorance.
  • Before we as individuals are even conscious of our existence we have been profoundly influenced for a considerable time (since before birth) by our relationship to other individuals who have complicated histories, and are members of a society which has an infinitely more complicated and longer history than they do (and are members of it at a particular time and place in that history); and by the time we are able to make conscious choices we are already making use of categories in a language which has reached a particular degree of development through the lives of countless generations of human beings before us. . . . We are social creatures to the inmost centre of our being. The notion that one can begin anything at all from scratch, free from the past, or unindebted to others, could not conceivably be more wrong.
    • As quoted in Popper (1973) by Bryan Magee
  • Appealing to his [Einstein's] way of expressing himself in theological terms, I said: If God had wanted to put everything into the universe from the beginning, He would have created a universe without change, without organisms and evolution, and without man and man's experience of change. But he seems to have thought that a live universe with events unexpected even by Himself would be more interesting than a dead one.
    • As quoted in Omnipotence and Other Theological Mistakes by Charles Hartshorne (1984)
  • There is an almost universal tendency, perhaps an inborn tendency, to suspect the good faith of a man who holds opinions that differ from our own opinions. … It obviously endangers the freedom and the objectivity of our discussion if we attack a person instead of attacking an opinion or, more precisely, a theory.
    • "The Importance of Critical Discussion" in On the Barricades: Religion and Free Inquiry in Conflict (1989) by Robert Basil
  • Science may be described as the art of systematic over-simplification — the art of discerning what we may with advantage omit.
    • The Open Universe : An Argument for Indeterminism (1992), p. 44
  • I think so badly of philosophy that I don't like to talk about it. … I do not want to say anything bad about my dear colleagues, but the profession of teacher of philosophy is a ridiculous one. We don't need a thousand of trained, and badly trained, philosophers — it is very silly. Actually most of them have nothing to say.
    • As quoted in "At 90, and Still Dynamic : Revisiting Sir Karl Popper and Attending His Birthday Party" by Eugene Yue-Ching Ho, in Intellectus 23 (Jul-Sep 1992)
  • I appeal to the philosophers of all countries to unite and never again mention Heidegger or talk to another philosopher who defends Heidegger. This man was a devil. I mean, he behaved like a devil to his beloved teacher, and he has a devilish influence on Germany. … One has to read Heidegger in the original to see what a swindler he was.
    • As quoted in "At 90, and Still Dynamic : Revisiting Sir Karl Popper and Attending His Birthday Party" by Eugene Yue-Ching Ho, in Intellectus 23 (Jul-Sep 1992)
  • When I speak of reason or rationalism, all I mean is the conviction that we can learn through criticism of our mistakes and errors, especially through criticism by others, and eventually also through self-criticism. A rationalist is simply someone for whom it is more important to learn than to be proved right; someone who is willing to learn from others — not by simply taking over another's opinions, but by gladly allowing others to criticize his ideas and by gladly criticizing the ideas of others. The emphasis here is on the idea of criticism or, to be more precise, critical discussion. The genuine rationalist does not think that he or anyone else is in possession of the truth; nor does he think that mere criticism as such helps us achieve new ideas. But he does think that, in the sphere of ideas, only critical discussion can help us sort the wheat from the chaff. He is well aware that acceptance or rejection of an idea is never a purely rational matter; but he thinks that only critical discussion can give us the maturity to see an idea from more and more sides and to make a correct judgement of it.
    • "On Freedom" in All Life is Problem Solving (1999)
  • Those who promise us paradise on earth never produced anything but a hell.
    • As quoted in In Passing: Condolences and Complaints on Death, Dying, and Related Disappointments (2005) by Jon Winokur, p. 144
  • Philosophers should consider the fact that the greatest happiness principle can easily be made an excuse for a benevolent dictatorship. We should replace it by a more modest and more realistic principle — the principle that the fight against avoidable misery should be a recognized aim of public policy, while the increase of happiness should be left, in the main, to private initiative.
    • As quoted in 1,001 Pearls of Wisdom (2006) by David Ross
  • True ignorance is not the absence of knowledge, but the refusal to acquire it.
  • Good tests kill flawed theories; we remain alive to guess again.
    • As quoted in My Universe : A Transcendent Reality (2011) by Alex Vary, Part II

The Logic of Scientific Discovery (1934)[edit]

First translated into English in 1959
  • ...no matter how many instances of white swans we may have observed, this does not justify the conclusion that all swans are white.
  • ...The answer to this problem is: as implied by Hume, we certainly are not justified in reasoning from an instance to the truth of the corresponding law. But to this negative result a second result, equally negative, may be added: we are justified in reasoning from a counterinstance to the falsity of the corresponding universal law (that is, of any law of which it is a counterinstance). Or in other words, from a purely logical point of view, the acceptance of one counterinstance to 'All swans are white' implies the falsity of the law 'All swans are white' - that law, that is, whose counterinstance we accepted. Induction is logically invalid; but refutation or falsification is a logically valid way of arguing from a single counterinstance to - or, rather, against - the corresponding law.This shows that I continue to agree with Hume's negative logical result; but I extend it.This logical situation is completely independent of any question of whether we would, in practice, accept a single counterinstance - for example, a solitary black swan - in refutation of a so far highly successful law. I do not suggest that we would necessarily be so easily satisfied; we might well suspect that the black specimen before us was not a swan."
  • A principle of induction would be a statement with the help of which we could put inductive inferences into a logically acceptable form. In the eyes of the upholders of inductive logic, a principle of induction is of supreme importance for scientific method: "… this principle", says Reichenbach, "determines the truth of scientific theories. To eliminate it from science would mean nothing less than to deprive science of the power to decide the truth or falsity of its theories. Without it, clearly, science would no longer have the right to distinguish its theories from the fanciful and arbitrary creations of the poet's mind."
    Now this principle of induction cannot be a purely logical truth like a tautology or an analytic statement. Indeed, if there were such a thing as a purely logical principle of induction, there would be no problem of induction; for in this case, all inductive inferences would have to be regarded as purely logical or tautological transformations, just like inferences in inductive logic. Thus the principle of induction must be a synthetic statement; that is, a statement whose negation is not self-contradictory but logically possible. So the question arises why such a principle should be accepted at all, and how we can justify its acceptance on rational grounds.
    • Ch. 1 "A Survey of Some Fundamental Problems", Section I: The Problem of Induction
  • The game of science is, in principle, without end. He who decides one day that scientific statements do not call for any further test, and that they can be regarded as finally verified, retires from the game.
    • Ch. 2 "On the Problem of a Theory of Scientific Method", Section XI: Methodological Rules as Conventions
  • Bold ideas, unjustified anticipations, and speculative thought, are our only means for interpreting nature: our only organon, our only instrument, for grasping her. And we must hazard them to win our prize. Those among us who are unwilling to expose their ideas to the hazard of refutation do not take part in the scientific game.
    • Ch. 10 "Corroboration, or How a Theory Stands up to Tests", section 85: The Path of Science, p. 280

The Open Society and Its Enemies (1945)[edit]

  • If in this book harsh words are spoken about some of the greatest among the intellectual leaders of mankind, my motive is not, I hope, the wish to belittle them. It springs rather from my conviction that, if our civilization is to survive, we must break with the habit of deference to great men. Great men may make great mistakes; and as the book tries to show, some of the greatest leaders of the past supported the perennial attack on freedom and reason. Their influence, too rarely challenged, continues to mislead those on whose defence civilization depends, and to divide them. The responsibility of this tragic and possibly fatal division becomes ours if we hesitate to be outspoken in our criticism of what admittedly is a part of our intellectual heritage. By reluctance to criticize some of it, we may help to destroy it all.
    • Preface to the First Edition
  • I see now more clearly than ever before that even our greatest troubles spring from something that is as admirable and sound as it is dangerous — from our impatience to better the lot of our fellows. For these troubles are the by-products of what is perhaps the greatest of all moral and spiritual revolutions of history, a movement which began three centuries ago. It is the longing of uncounted unknown men to free themselves and their minds from the tutelage of authority and prejudice. It is their attempt to build up an open society which rejects the absolute authority to preserve, to develop, and to establish traditions, old or new, that measure up to their standards of freedom, of humaneness, and of rational criticism. It is their unwillingness to sit back and leave the entire responsibility for ruling the world to human or superhuman authority,and their readiness to share the burden of responsibility for avoidable suffering, and to work for its avoidance. This revolution has created powers of appalling destructiveness; but they may yet be conquered.
    • Preface to the Second Edition.
  • This book raises issues that might not be apparent from the table of contents.
    It sketches some of the difficulties faced by our civilization — a civilization which might be perhaps described as aiming at humanness and reasonableness, at equality and freedom; a civilization which is still in its infancy, as it were, and which continues to grow in spite of the fact that it has been so often betrayed by so many of the intellectual leaders of mankind. It attempts to show that this civilization has not yet fully recovered from the shock of its birth — the transition from the tribal or "enclosed society," with its submission to magical forces, to the 'open society' which sets free the critical powers of man. It attempts to show that the shock of this transition is one of the factors that have made possible the rise of those reactionary movements which have tried, and still try, to overthrow civilization and to return to tribalism.
    • Introduction; part of this has sometimes been paraphrased : Our civilization has not yet fully recovered from the shock of its birth — the transition from the tribal or 'closed society', with its submission to magical forces, to the 'open society' which sets free the critical powers of man.
  • We may become the makers of our fate when we have ceased to pose as its prophets.
  • What a monument of human smallness is this idea of the philosopher king. What a contrast between it and the simplicity of humaneness of Socrates, who warned the statesmen against the danger of being dazzled by his own power, excellence, and wisdom, and who tried to teach him what matters most — that we are all frail human beings. What a decline from this world of irony and reason and truthfulness down to Plato's kingdom of the sage whose magical powers raise him high above ordinary men; although not quite high enough to forgo the use of lies, or to neglect the sorry trade of every shaman — the selling of spells, of breeding spells, in exchange for power over his fellow-men.
    • Vol. 1, Ch 8 "The Philosopher King"
  • The open society is one in which men have learned to be to some extent critical of taboos, and to base decisions on the authority of their own intelligence.
    • Vol. 1, Endnotes to the Chapters : Notes to the Introduction.
  • In speaking of sociological laws or natural laws of social life I have in mind such laws as are formulated by modern economic theories, for instance, the theory of international trade, or the theory of the trade cycle. These and other important sociological laws are connected with the functioning of social institutions. These laws play a role in our social life corresponding to the role played in mechanical engineering by, say, the principle of the lever. For institutions, like levers, are needed if we want to achieve anything which goes beyond the power of our muscles. Like machines, institutions multiply our power for good or evil. Like machines, they need intelligent supervision by someone who understands their way of functioning and, most of all, their purpose, since we cannot build them so that they work entirely automatically.
    • Karl Popper, The Open Society and its Enemies, Vol I Plato Chapter 5: Nature and Convention. P. 67
  • The so-called paradox of freedom is the argument that freedom in the sense of absence of any constraining control must lead to very great restraint, since it makes the bully free to enslave the meek. The idea is, in a slightly different form, and with very different tendency, clearly expressed in Plato.
    Less well known is the paradox of tolerance: Unlimited tolerance must lead to the disappearance of tolerance. If we extend unlimited tolerance even to those who are intolerant, if we are not prepared to defend a tolerant society against the onslaught of the intolerant, then the tolerant will be destroyed, and tolerance with them. — In this formulation, I do not imply, for instance, that we should always suppress the utterance of intolerant philosophies; as long as we can counter them by rational argument and keep them in check by public opinion, suppression would certainly be unwise. But we should claim the right to suppress them if necessary even by force; for it may easily turn out that they are not prepared to meet us on the level of rational argument, but begin by denouncing allargument; they may forbid their followers to listen to rational argument, because it is deceptive, and teach them to answer arguments by the use of their fists or pistols. We should therefore claim, in the name of tolerance, the right not to tolerate the intolerant. We should claim that any movement preaching intolerance places itself outside the law, and we should consider incitement to intolerance and persecution as criminal, in the same way as we should consider incitement to murder, or to kidnapping, or to the revival of the slave trade, as criminal.
    • Vol. 1, Notes to the Chapters: Ch. 7, Note 4
  • We must plan for freedom, and not only for security, if for no other reason than that only freedom can make security secure.
    • Vol. 2, Ch. 21 "An Evaluation of the Prophecy"
  • No rational argument will have a rational effect on a man who does not want to adopt a rational attitude.
    • Vol. 2, Ch. 24 "Oracular Philosophy and the Revolt against Reason"
  • I do not overlook the fact that there are irrationalists who love mankind, and that not all forms of irrationalism engender criminality. But I hold that he who teaches that not reason but love should rule opens up the way for those who rule by hate. (Socrates, I believe, saw something of this when he suggested that mistrust or hatred of argument is related to mistrust or hatred of man).
    • Vol. 2, Ch. 24 "Oracular Philosophy and the Revolt against Reason"
  • ... the attempt to make heaven on earth invariably produces hell. It leads to intolerance. It leads to religious wars, and to the saving of souls through the inquisition. And it is, I believe, based on a complete misunderstanding of our moral duties. It is our duty to help those who need help; but it cannot be our duty to make others happy, since this does not depend on us, and since it would only too often mean intruding on the privacy of those towards whom we have such amiable intentions.
    • Vol. 2, Ch. 24 "Oracular Philosophy and the Revolt against Reason"
  • There is no history of mankind, there is only an indefinite number of histories of all kinds of aspects of human life. And one of these is the history of political power. This is elevated into the history of the world. But this, I hold, is an offence against every decent conception of mankind. It is hardly better than to treat the history of embezzlement or of robbery or of poisoning as the history of mankind. For the history of power politics is nothing but the history of international crime and mass murder (including it is true, some of the attempts to suppress them). This history is taught in schools, and some of the greatest criminals are extolled as heroes.
    • Vol 2, Ch. 25 "Has History any Meaning?" Variant: There is no history of mankind, there are only many histories of all kinds of aspects of human life. And one of these is the history of political power. This is elevated into the history of the world.

Utopia and Violence (1947)[edit]

Address to Institut des Arts in Brussels, Belgium (1947); later published The Hibbert Journal 46 (1948), and in Conjectures and Refutations: The Growth of Scientific Knowledge (1963)
  • Not only do I hate violence, but I firmly believe that the fight against it is not hopeless. I realize that the task is difficult. I realize that, only too often in the course of history, it has happened that what appeared at first to be a great success in the fight against violence was followed by a defeat. I do not overlook the fact that the new age of violence which was opened by the two World wars is by no means at an end. Nazism and Fascism are thoroughly beaten, but I must admit that their defeat does not mean that barbarism and brutality have been defeated. On the contrary, it is no use closing our eyes to the fact that these hateful ideas achieved something like a victory in defeat. I have to admit that Hitler succeeded in degrading the moral standards of our Western world, and that in the world of today there is more violence and brutal force than would have been tolerated even in the decade after the first World war. And we must face the possibility that our civilization may ultimately be destroyed by those new weapons which Hitlerism wished upon us, perhaps even within the first decade after the second World war; for no doubt the spirit of Hitlerism won its greatest victory over us when, after its defeat, we used the weapons which the threat of Nazism had induced us to develop.
  • A rationalist, as I use the word, is a man who attempts to reach decisions by argument and perhaps, in certain cases, by compromise, rather than by violence. He is a man who would rather be unsuccessful in convincing another man by argument than successful in crushing him by force, by intimidation and threats, or even by persuasive propaganda.
  • We all remember how many religious wars were fought for a religion of love and gentleness; how many bodies were burned alive with the genuinely kind intention of saving souls from the eternal fire of hell. Only if we give up our authoritarian attitude in the realm of opinion, only if we establish the attitude of give and take, of readiness to learn from other people, can we hope to control acts of violence inspired by piety and duty.
  • There are many difficulties impeding the rapid spread of reasonableness. One of the main difficulties is that it always takes two to make a discussion reasonable. Each of the parties must be ready to learn from the other. You cannot have a rational discussion with a man who prefers shooting you to being convinced by you.
  • Do not allow your dreams of a beautiful world to lure you away from the claims of men who suffer here and now. Our fellow men have a claim to our help; no generation must be sacrificed for the sake of future generations, for the sake of an ideal of happiness that may never be realised.

On Freedom (1958)[edit]

"On Freedom" (1958; 1967) essay republished in Alles Leben ist Problemlösen (1994); translated as All Life is Problem Solving by Patrick Camiller (1994)
  • The true Enlightenment thinker, the true rationalist, never wants to talk anyone into anything. No, he does not even want to convince; all the time he is aware that he may be wrong. Above all, he values the intellectual independence of others too highly to want to convince them in important matters. He would much rather invite contradiction, preferably in the form of rational and disciplined criticism. He seeks not to convince but to arouse — to challenge others to form free opinions.
  • Although I consider our political world to be the best of which we have any historical knowledge, we should beware of attributing this fact to democracy or to freedom. Freedom is not a supplier who delivers goods to our door. Democracy does not ensure that anything is accomplished — certainly not an economic miracle. It is wrong and dangerous to extol freedom by telling people that they will certainly be all right once they are free. How someone fares in life is largely a matter of luck or grace, and to a comparatively small degree perhaps also of competence, diligence, and other virtues. The most we can say of democracy or freedom is that they give our personal abilities a little more influence on our well-being.
  • It is wrong to think that belief in freedom always leads to victory; we must always be prepared for it to lead to defeat. If we choose freedom, then we must be prepared to perish along with it. Poland fought for freedom as no other country did. The Czech nation was prepared to fight for its freedom in 1938; it was not lack of courage that sealed its fate. The Hungarian Revolution of 1956 — the work of young people with nothing to lose but their chains — triumphed and then ended in failure. … Democracy and freedom do not guarantee the millennium. No, we do not choose political freedom because it promises us this or that. We choose it because it makes possible the only dignified form of human coexistence, the only form in which we can be fully responsible for ourselves. Whether we realize its possibilities depends on all kinds of things — and above all on ourselves.

Conjectures and Refutations: The Growth of Scientific Knowledge (1963)[edit]

  • The more we learn about the world, and the deeper our learning, the more conscious, specific, and articulate will be our knowledge of what we do not know, our knowledge of our ignorance. For this, indeed, is the main source of our ignorance — the fact that our knowledge can be only finite, while our ignorance must necessarily be infinite.
    • Variant translation: The more we learn about the world, and the deeper our learning, the more conscious, clear, and well-defined will be our knowledge of what we do not know, our knowledge of our ignorance. The main source of our ignorance lies in the fact that our knowledge can only be finite, while our ignorance must necessarily be infinite.
  • What we should do, I suggest, is to give up the idea of ultimate sources of knowledge, and admit that all knowledge is human; that it is mixed with our errors, our prejudices, our dreams, and our hopes; that all we can do is to grope for truth even though it be beyond our reach. We may admit that our groping is often inspired, but we must be on our guard against the belief, however deeply felt, that our inspiration carries any authority, divine or otherwise. If we thus admit that there is no authority beyond the reach of criticism to be found within the whole province of our knowledge, however far it may have penetrated into the unknown, then we can retain, without danger, the idea that truth is beyond human authority. And we must retain it. For without this idea there can be no objective standards of inquiry; no criticism of our conjectures; no groping for the unknown; no quest for knowledge.
    • Introduction "On The Sources of Knowledge and of Ignorance" Section XVII, p. 30 Variant translation: I believe it is worthwhile trying to discover more about the world, even if this only teaches us how little we know. It might do us good to remember from time to time that, while differing widely in the various little bits we know, in our infinite ignorance we are all equal.
      If we thus admit that there is no authority beyond the reach of criticism to be found within the whole province of our knowledge, however far we may have penetrated into the unknown, then we can retain, without risk of dogmatism, the idea that truth itself is beyond all human authority. Indeed, we are not only able to retain this idea, we must retain it. For without it there can be no objective standards of scientific inquiry, no criticism of our conjectured solutions, no groping for the unknown, and no quest for knowledge.
  • Science must begin with myths, and with the criticism of myths.
    • Ch. 1 "Science : Conjectures and Refutations", Section VII
  • The history of science, like the history of all human ideas, is a history of irresponsible dreams, of obstinacy, and of error. But science is one of the very few human activities — perhaps the only one — in which errors are systematically criticized and fairly often, in time, corrected. This is why we can say that, in science, we often learn from our mistakes, and why we can speak clearly and sensibly about making progress there.
    • Ch. 1 "Science : Conjectures and Refutations"
  • Put in a nut-shell, my thesis amounts to this. The repeated attempts made by Rudolf Carnap to show that the demarcation between science and metaphysics coincides with that between sense and nonsense have failed. The reason is that the positivistic concept of 'meaning' or 'sense' (or of verifiability, or of inductive confirmability, etc.) is inappropriate for achieving this demarcation — simply because metaphysics need not be meaningless even though it is not science. In all its variations demarcation by meaninglessness has tended to be at the same time too narrow and too wide: as against all intentions and all claims, it has tended to exclude scientific theories as meaningless, while failing to exclude even that part of metaphysics which is known as 'rational theology'.
    • Ch 11. "The Demarcation between Science and Metaphysics." (Summary, p. 253)
  • It is often asserted that discussion is only possible between people who have a common language and accept common basic assumptions. I think that this is a mistake. All that is needed is a readiness to learn from one's partner in the discussion, which includes a genuine wish to understand what he intends to say. If this readiness is there, the discussion will be the more fruitful the more the partner's backgrounds differ.
  • It seems to me certain that more people are killed out of righteous stupidity than out of wickedness.
  • As for Adler, I was much impressed by a personal experience. Once, in 1919, I reported to him a case which to me did not seem particularly Adlerian, but which he found no difficulty in analyzing in terms of his theory of inferiority feelings, although he had not even seen the child. Slightly shocked, I asked him how he could be so sure. "Because of my thousandfold experience," he replied; whereupon I could not help saying: "And with this new case, I suppose, your experience has become thousand-and-one-fold."
  • I may illustrate this by two very different examples of human behaviour: that of a man who pushes a child into the water with the intention of drowning it; and that of a man who sacrifices his life in an attempt to save the child. Each of these two cases can be explained with equal ease in Freudian and in Adlerian terms. According to Freud the first man suffered from repression (say, of some component of his Oedipus complex), while the second man had achieved sublimation. According to Adler the first man suffered from feelings of inferiority (producing perhaps the need to prove to himself that he dared to commit some crime), and so did the second man (whose need was to prove to himself that he dared to rescue the child). I could not think of any human behaviour which could not be interpreted in terms of either theory. It was precisely this fact — that they always fitted, that they were always confirmed — which in the eyes of their admirers constituted the strongest argument in favour of these theories. It began to dawn on me that this apparent strength was in fact their weakness.
  • There are all kinds of sources of our knowledge; but none has authority … The fundamental mistake made by the philosophical theory of the ultimate sources of our knowledge is that it does not distinguish clearly enough between questions of origin and questions of validity.

Unended Quest: An Intellectual Autobiography (1976)[edit]

  • Always remember that it is impossible to speak in such a way that you cannot be misunderstood: there will always be some who misunderstand you.
  • Darwinism is not a testable scientific theory, but a metaphysical research program.
    • Unsourced variant: Evolution is not a fact. Evolution doesn't even qualify as a theory or as a hypothesis. It is a metaphysical research program, and it is not really testable science.
Popper later retracted his criticisms:
  • I have changed my mind about the testability and logical status of the theory of natural selection; and I am glad to have an opportunity to make a recantation.
  • "Natural selection and the emergence of mind" dialectica Vol. 32 (1978), p. 339-355; republished in Evolutionary Epistemology, Rationality, and the Sociology of Knowledge (1987) edited by Gerard Radnitzky and W. W. Bartley, III

In Search of a Better World (1984)[edit]

  • The belief in a politicalUtopia is especially dangerous. This is possibly connected with the fact that the search for a better world, like the investigation of our environment, is (if I am correct) one of the oldest and most important of all the instincts.
  • Our aim as scientists is objective truth; more truth, more interesting truth, more intelligible truth. We cannot reasonably aim at certainty. Once we realize that human knowledge is fallible, we realize also that we can never be completely certain that we have not made a mistake.
  • There are uncertain truths — even true statements that we may take to be false — but there are no uncertain certainties.
    Since we can never know anything for sure, it is simply not worth searching for certainty; but it is well worth searching for truth; and we do this chiefly by searching for mistakes, so that we have to correct them.
  • Why do I think that we, the intellectuals, are able to help? Simply because we, the intellectuals, have done the most terrible harm for thousands of years. Mass murder in the name of an idea, a doctrine, a theory, a religion — that is all our doing, our invention: the invention of the intellectuals. If only we would stop setting man against man — often with the best intentions — much would be gained. Nobody can say that it is impossible for us to stop doing this.


These are quotations that have been wrongly attributed to Popper
  • To be ignorant of the past is to remain a child.
  • The deepest, the only theme of human history, compared to which all others are of subordinate importance, is the conflict of skepticism with faith.
  • Leadership is solving problems. The day soldiers stop bringing you their problems is the day you have stopped leading them. They have either lost confidence that you can help or concluded you do not care. Either case is a failure of leadership.
  • When we enter a new situation in life and are confronted by a new person, we bring with us the prejudices of the past and our previous experiences of people. These prejudices we project upon the new person. Indeed, getting to know a person is largely a matter of withdrawing projections; of dispelling the smoke screen of what we imagine he is like and replacing it with the reality of what he is actually like.

Quotes about Popper[edit]

  • The first article republished in Studies in Philosophy, Politics and Economics, “Degrees of Explanation,” originally published in 1955, was largely consistent with Popper’s methodology. Hayek embraced Popper’s “hypothetico-deductive” approach to science: “The conception of science as a hypothetico-deductive system has been expounded by Karl Popper in a manner which brings out clearly some very important points.” Here, as elsewhere in his work, Hayek distinguished between the facts of the natural and social sciences primarily on the basis of their complexity.
    • Alan Ebenstein, Hayek's Journey: The Mind of Friedrich Hayek (2003), Ch. 14. Studies in Philosophy, Politics and Economics
  • I learned from Popper what for me is the essence of scientific investigation—how to be speculative and imaginative in the creation of hypotheses, and then to challenge them with the utmost rigor, both by utilizing all existing knowledge and by mounting the most searching experimental attacks. In fact, I learned from him even to rejoice in the refutation of a cherished hypothesis, because that, too, is a scientific achievement and because much has been learned by the refutation.
    • John Eccles, "Under the spell of the synapse," The Neurosciences: Paths of Discovery ed. F. G. Worden, J. P. Swazey, G. Adelman (1976)
  • Through my association with Popper I experienced a great liberation in escaping from the rigid conventions that are generally held with respect to scientific research. ... When one is liberated from these restrictive dogmas, scientific investigation becomes an exciting adventure opening up new visions; and this attitude has, I think, been reflected in my own scientific life since that time.
    • John Eccles, "Under the spell of the synapse," The Neurosciences: Paths of Discovery ed. F. G. Worden, J. P. Swazey, G. Adelman (1976)
  • The leading critic of the positivists in their heyday was of course Popper. There has been a tendency for philosophers of science to regard Popper as something of an embarrassment. However, naturalistic philosophers should take it as an interesting fact about science that Popper has long been the favourite philosopher of science among scientists; and it would be condescending to attribute this entirely to the fact that Popper’s philosophy is relatively non-complex, self-contained, and flattering to scientists.
    • James Ladyman and Don Ross, "The World in the Data" in Scientific Metaphysics (2013) edited by Don Ross, James Ladyman, and Harold Kincaid
  • Socrates (and so Plato) makes it quite clear that the rule of wisdom is tyrannical, and that it cannot tolerate words or deeds, laws or traditional institutions, and certainly political theories that impinge upon its rule. In this sense, modern enemies of Plato’s political thought, of whom the most prominent in our time is no doubt Karl Popper, are correct in their objections, although they are ingenuous or let us say insufficiently rigorous in their consideration of the political consequences of theoretical truth. In Popper’s case, this is probably due to his conviction that we can establish the falsehood of a proposition but not its truth. This conviction may well be more compatible with democracy in the modern sense of the term than the conviction that genuine philosophers know the truth. The argument of the Republic on the other hand is that, if we did know the truth, we would be led to support a city very much like the one constructed in the Republic under the leadership of Socrates.
  • I do have a great respect for Popper. I mean, I think... he's nearer to... I mean, Popper's ambition, in relation to science, at least, was to discriminate between, sort of, science and what he called pseudo-science.

See also[edit]

External links[edit]

This civilization has not yet fully recovered from the shock of its birth — the transition from the tribal or "enclosed society," with its submission to magicalforces, to the 'open society' which sets free the critical powers of man.
If we are uncritical we shall always find what we want: we shall look for, and find, confirmations, and we shall look away from, and not see, whatever might be dangerous to our pet theories...
Whenever a theory appears to you as the only possible one, take this as a sign that you have neither understood the theory nor the problem which it was intended to solve.
We are social creatures to the inmost centre of our being. The notion that one can begin anything at all from scratch, free from the past, or unindebted to others, could not conceivably be more wrong.
Science may be described as the art of systematic over-simplification — the art of discerning what we may with advantage omit.
The genuine rationalist does not think that he or anyone else is in possession of the truth; nor does he think that mere criticism as such helps us achieve new ideas. But he does think that, in the sphere of ideas, only critical discussion can help us sort the wheat from the chaff.
...no matter how many instances of white swans we may have observed, this does not justify the conclusion that all swans are white.
We may become the makers of our fate when we have ceased to pose as its prophets.
If we extend unlimited tolerance even to those who are intolerant, if we are not prepared to defend a tolerant society against the onslaught of the intolerant, then the tolerant will be destroyed, and tolerance with them.
We must plan for freedom, and not only for security, if for no other reason than that only freedom can make security secure.
There is no history of mankind, there is only an indefinite number of histories of all kinds of aspects of humanlife.
I believe it is worthwhile trying to discover more about the world, even if this only teaches us how little we know.
Always remember that it is impossible to speak in such a way that you cannot be misunderstood: there will always be some who misunderstand you.

Critical thinking is the objective analysis of facts to form a judgment.[1] The subject is complex, and there are several different definitions which generally include the rational, skeptical, unbiased analysis or evaluation of factual evidence.


Critical thinking was described by Richard W. Paul as a movement in two waves (1994).[2] The "first wave" of critical thinking is often referred to as a 'critical analysis' that is clear, rational thinking involving critique. Its details vary amongst those who define it. According to Barry K. Beyer (1995), critical thinking means making clear, reasoned judgments. During the process of critical thinking, ideas should be reasoned, well thought out, and judged.[3] The U.S. National Council for Excellence in Critical Thinking[4] defines critical thinking as the "intellectually disciplined process of actively and skillfully conceptualizing, applying, analyzing, synthesizing, or evaluating information gathered from, or generated by, observation, experience, reflection, reasoning, or communication, as a guide to belief and action."[5]


In the term critical thinking, the word critical, (Grk. κριτικός = kritikos = "critic") derives from the word critic and implies a critique; it identifies the intellectual capacity and the means "of judging", "of judgement", "for judging", and of being "able to discern".[6]


Traditionally, critical thinking has been variously defined as:

  • "the process of actively and skillfully conceptualizing, applying, analyzing, synthesizing, and evaluating information to reach an answer or conclusion"[7]
  • "disciplined thinking that is clear, rational, open-minded, and informed by evidence"[7]
  • "reasonable, reflective thinking focused on deciding what to believe or do"[8]
  • "purposeful, self-regulatory judgment which results in interpretation, analysis, evaluation, and inference, as well as explanation of the evidential, conceptual, methodological, criteriological, or contextual considerations upon which that judgment is based"[9]
  • "includes a commitment to using reason in the formulation of our beliefs"[10]
  • the skill and propensity to engage in an activity with reflective scepticism (McPeck, 1981)
  • disciplined, self-directed thinking which exemplifies the perfection of thinking appropriate to a particular mode or domain of thinking (Paul, 1989, p. 214)
  • thinking about one's thinking in a manner designed to organize and clarify, raise the efficiency of, and recognize errors and biases in one's own thinking. Critical thinking is not 'hard' thinking nor is it directed at solving problems (other than 'improving' one's own thinking). Critical thinking is inward-directed with the intent of maximizing the rationality of the thinker. One does not use critical thinking to solve problems—one uses critical thinking to improve one's process of thinking.[11]
  • "an appraisal based on careful analytical evaluation"[12]
  • the ability to think clearly about what to do or what to believe.

Contemporary critical thinking scholars have expanded these traditional definitions to include qualities, concepts, and processes such as creativity, imagination, discovery, reflection, empathy, connecting knowing, feminist theory, subjectivity, ambiguity, and inconclusiveness. Some definitions of critical thinking exclude these subjective practices.[13]

Logic and rationality[edit]

Main article: Logic and rationality

The ability to reason logically is a fundamental skill of rational agents, hence the study of the form of correct argumentation is relevant to the study of critical thinking.

"First wave" logical thinking consisted of understanding the connections between two concepts or points in thought. It followed a philosophy where the thinker was removed from the train of thought and the connections and the analysis of the connect was devoid of any bias of the thinker. Kerry Walters describes this ideology in his essay Beyond Logicism in Critical Thinking, "A logistic approach to critical thinking conveys the message to students that thinking is legitimate only when it conforms to the procedures of informal (and, to a lesser extent, formal) logic and that the good thinker necessarily aims for styles of examination and appraisal that are analytical, abstract, universal, and objective. This model of thinking has become so entrenched in conventional academic wisdom that many educators accept it as canon" (Walters, 1994, p. 1). The adoption of these principals parallel themselves with the increasing reliance on quantitative understanding of the world.

In the ‘second wave’ of critical thinking, as defined by Kerry S. Walters (Re-thinking Reason, 1994, p. 1 ), many authors moved away from the logocentric mode of critical thinking that the ‘first wave’ privileged, especially in institutions of higher learning. Walters summarizes logicism as "the unwarranted assumption that good thinking is reducible to logical thinking" (1994, p. 1).

"A logistic approach to critical thinking conveys the message to students that thinking is legitimate only when it conforms to the procedures of informal (and, to a lesser extent, formal) logic and that the good thinker necessarily aims for styles of examination and appraisal that are analytical, abstract, universal, and objective." (Walters, 1994, p. 1) As the ‘second wave’ took hold, scholars began to take a more inclusive view of what constituted as critical thinking. Rationality and logic are still widely accepted in many circles as the primary examples of critical thinking.

Deduction, Abduction and Induction[edit]

Main article: logical reasoning

There are three types of logical reasoning Informally, two kinds of logical reasoning can be distinguished in addition to formal deduction: induction and abduction.

e.g. X is human and all humans have a face so X has a face.
  • Induction is drawing a conclusion from a pattern that is guaranteed by the strictness of the structure to which it applies.
e.g. The sum of even integers is even. 2x+2y = 2(x+y); The sum of integers is an integer and x and y are integers, so 2x+2y=2z where z is an integer, thus 2z is an even integer, so the sum of even integers is even.
  • Abduction is drawing a conclusion using a heuristic which is likely but not certain given some foreknowledge.
e.g. I observe sheep in a field and they appear white from my viewing angle, so sheep are white. Contrast with the deductive statement:"Some sheep are white on at least one side."

Critical thinking and rationality[edit]

Kerry S. Walters (Re-thinking Reason, 1994) argues that rationality demands more than just logical or traditional methods of problem solving and analysis or what he calls the "calculus of justification" but also considers "cognitive acts such as imagination, conceptual creativity, intuition and insight" (p. 63). These "functions" are focused on discovery, on more abstract processes instead of linear, rules-based approaches to problem solving. The linear and non-sequential mind must both be engaged in the rationalmind.

The ability to critically analyze an argument – to dissect structure and components, thesis and reasons – is important. But so is the ability to be flexible and consider non-traditional alternatives and perspectives. These complementary functions are what allow for critical thinking a practice encompassing imagination and intuition in cooperation with traditional modes of deductive inquiry.


The list of core critical thinking skills includes observation, interpretation, analysis, inference, evaluation, explanation, and metacognition. According to Reynolds (2011), an individual or group engaged in a strong way of critical thinking gives due consideration to establish for instance:[14]

  • Evidence through reality
  • Context skills to isolate the problem from context
  • Relevant criteria for making the judgment well
  • Applicable methods or techniques for forming the judgment
  • Applicable theoretical constructs for understanding the problem and the question at hand

In addition to possessing strong critical-thinking skills, one must be disposed to engage problems and decisions using those skills. Critical thinking employs not only logic but broad intellectual criteria such as clarity, credibility, accuracy, precision, relevance, depth, breadth, significance, and fairness.[15]


Critical thinking calls for the ability to:

  • Recognize problems, to find workable means for meeting those problems
  • Understand the importance of prioritization and order of precedence in problem solving
  • Gather and marshal pertinent (relevant) information
  • Recognize unstated assumptions and values
  • Comprehend and use language with accuracy, clarity, and discernment
  • Interpret data, to appraise evidence and evaluate arguments
  • Recognize the existence (or non-existence) of logical relationships between propositions
  • Draw warranted conclusions and generalizations
  • Put to test the conclusions and generalizations at which one arrives
  • Reconstruct one's patterns of beliefs on the basis of wider experience
  • Render accurate judgments about specific things and qualities in everyday life

In sum:

"A persistent effort to examine any belief or supposed form of knowledge in the light of the evidence that supports or refutes it and the further conclusions to which it tends."[16]

Habits or traits of mind[edit]

The habits of mind that characterize a person strongly disposed toward critical thinking include a desire to follow reason and evidence wherever they may lead, a systematic approach to problem solving, inquisitiveness, even-handedness, and confidence in reasoning.[17]

According to a definition analysis by Kompf & Bond (2001), critical thinking involves problem solving, decision making, metacognition, rationality, rational thinking, reasoning, knowledge, intelligence and also a moral component such as reflective thinking. Critical thinkers therefore need to have reached a level of maturity in their development, possess a certain attitude as well as a set of taught skills.


Edward M. Glaser proposed that the ability to think critically involves three elements:[16]

  1. An attitude of being disposed to consider in a thoughtful way the problems and subjects that come within the range of one's experiences
  2. Knowledge of the methods of logical inquiry and reasoning
  3. Some skill in applying those methods.

Educational programs aimed at developing critical thinking in children and adult learners, individually or in group problem solving and decision making contexts, continue to address these same three central elements.

The Critical Thinking project at Human Science Lab, London, is involved in scientific study of all major educational system in prevalence today to assess how the systems are working to promote or impede critical thinking.[18]

Contemporary cognitive psychology regards human reasoning as a complex process that is both reactive and reflective.[19]

The relationship between critical thinking skills and critical thinking dispositions is an empirical question. Some people have both in abundance, some have skills but not the disposition to use them, some are disposed but lack strong skills, and some have neither. A measure of critical thinking dispositions is the California Measure of Mental Motivation[20] and the California Critical Thinking Dispositions Inventory.[21]


John Dewey is one of many educational leaders who recognized that a curriculum aimed at building thinking skills would benefit the individual learner, the community, and the entire democracy.[22]

Critical thinking is significant in academics due to being significant in learning. Critical thinking is significant in the learning process of internalization, in the construction of basic ideas, principles, and theories inherent in content. And critical thinking is significant in the learning process of application, whereby those ideas, principles, and theories are implemented effectively as they become relevant in learners' lives.

Each discipline adapts its use of critical thinking concepts and principles. The core concepts are always there, but they are embedded in subject-specific content. For students to learn content, intellectual engagement is crucial. All students must do their own thinking, their own construction of knowledge. Good teachers recognize this and therefore focus on the questions, readings, activities that stimulate the mind to take ownership of key concepts and principles underlying the subject.

Historically, teaching of critical thinking focused only on logical procedures such as formal and informal logic. This emphasized to students that good thinking is equivalent to logical thinking. However, a second wave of critical thinking, urges educators to value conventional techniques, meanwhile expanding what it means to be a critical thinker. In 1994, Kerry Walters[23] compiled a conglomeration of sources surpassing this logical restriction to include many different authors’ research regarding connected knowing, empathy, gender-sensitive ideals, collaboration, world views, intellectual autonomy, morality and enlightenment. These concepts invite students to incorporate their own perspectives and experiences into their thinking.

In the English and Welsh school systems, Critical Thinking is offered as a subject that 16- to 18-year-olds can take as an A-Level. Under the OCRexam board, students can sit two exam papers for the AS: "Credibility of Evidence" and "Assessing and Developing Argument". The full Advanced GCE is now available: in addition to the two AS units, candidates sit the two papers "Resolution of Dilemmas" and "Critical Reasoning". The A-level tests candidates on their ability to think critically about, and analyze, arguments on their deductive or inductive validity, as well as producing their own arguments. It also tests their ability to analyze certain related topics such as credibility and ethical decision-making. However, due to its comparative lack of subject content, many universities do not accept it as a main A-level for admissions.[24] Nevertheless, the AS is often useful in developing reasoning skills, and the full Advanced GCE is useful for degree courses in politics, philosophy, history or theology, providing the skills required for critical analysis that are useful, for example, in biblical study.

There used to also be an Advanced Extension Award offered in Critical Thinking in the UK, open to any A-level student regardless of whether they have the Critical Thinking A-level. Cambridge International Examinations have an A-level in Thinking Skills.[25]

From 2008, Assessment and Qualifications Alliance has also been offering an A-level Critical Thinking specification.[26]

OCRexam board have also modified theirs for 2008. Many examinations for university entrance set by universities, on top of A-level examinations, also include a critical thinking component, such as the LNAT, the UKCAT, the BioMedical Admissions Test and the Thinking Skills Assessment.

In Qatar, critical thinking was offered by AL-Bairaq which is an outreach, non-traditional educational program that targets high school students and focuses on a curriculum based on STEM fields. The idea behind AL-Bairaq is to offer high school students the opportunity to connect with the research environment in the Center for Advanced Materials (CAM) at Qatar University. Faculty members train and mentor the students and help develop and enhance their critical thinking, problem-solving, and teamwork skills.[27][not in citation given]


In 1995, a meta-analysis of the literature on teaching effectiveness in higher education was undertaken.[28] The study noted concerns from higher education, politicians and business that higher education was failing to meet society's requirements for well-educated citizens. It concluded that although faculty may aspire to develop students' thinking skills, in practice they have tended to aim at facts and concepts utilizing lowest levels of cognition, rather than developing intellect or values.

In a more recent meta-analysis, researchers reviewed 341 quasi- or true-experimental studies, all of which used some form of standardized critical thinking measure to assess the outcome variable.[29] The authors describe the various methodological approaches and attempt to categorize the differing assessment tools, which include standardized tests (and second-source measures), tests developed by teachers, tests developed by researchers, and tests developed by teachers who also serve the role as the researcher. The results emphasized the need for exposing students to real-world problems and the importance in encouraging open dialogue within a supportive environment. Effective strategies for teaching critical thinking are thought to be possible in a wide variety of educational settings.[29]

Importance in academia[edit]

Critical thinking is an important element of all professional fields and academic disciplines (by referencing their respective sets of permissible questions, evidence sources, criteria, etc.). Within the framework of scientific skepticism, the process of critical thinking involves the careful acquisition and interpretation of information and use of it to reach a well-justified conclusion. The concepts and principles of critical thinking can be applied to any context or case but only by reflecting upon the nature of that application. Critical thinking forms, therefore, a system of related, and overlapping, modes of thought such as anthropological thinking, sociological thinking, historical thinking, political thinking, psychological thinking, philosophical thinking, mathematical thinking, chemical thinking, biological thinking, ecological thinking, legal thinking, ethical thinking, musical thinking, thinking like a painter, sculptor, engineer, business person, etc. In other words, though critical thinking principles are universal, their application to disciplines requires a process of reflective contextualization.

[30] However, even with knowledge of the methods of logical inquiry and reasoning, mistakes can happen due to a thinker's inability to apply the methods or because of character traits such as egocentrism. Critical thinking includes identification of prejudice, bias, propaganda, self-deception, distortion, misinformation, etc.[31] Given research in cognitive psychology, some educators believe that schools should focus on teaching their students critical thinking skills and cultivation of intellectual traits.[32]

Critical thinking skills can be used to help nurses during the assessment process. Through the use of critical thinking, nurses can question, evaluate, and reconstruct the nursing care process by challenging the established theory and practice. Critical thinking skills can help nurses problem solve, reflect, and make a conclusive decision about the current situation they face. Critical thinking creates "new possibilities for the development of the nursing knowledge."[33] Due to the sociocultural, environmental, and political issues that are affecting healthcare delivery, it would be helpful to embody new techniques in nursing. Nurses can also engage their critical thinking skills through the Socratic method of dialogue and reflection. This practice standard is even part of some regulatory organizations such as the College of Nurses of Ontario – Professional Standards for Continuing Competencies (2006).[34] It requires nurses to engage in Reflective Practice and keep records of this continued professional development for possible review by the College.

Critical thinking is also considered important for human rights education for toleration. The Declaration of Principles on Tolerance adopted by UNESCO in 1995 affirms that "education for tolerance could aim at countering factors that lead to fear and exclusion of others, and could help young people to develop capacities for independent judgement, critical thinking and ethical reasoning."[35]

Critical thinking is used as a way of deciding whether a claim is true, partially true, or false. It is a tool by which one can come about reasoned conclusions based on a reasoned process.

Critical thinking in computer-mediated communication[edit]

The advent and rising popularity of online courses has prompted some to ask if computer-mediated communication (CMC) promotes, hinders, or has no effect on the amount and quality of critical thinking in a course (relative to face-to-face communication). There is some evidence to suggest a fourth, more nuanced possibility: that CMC may promote some aspects of critical thinking but hinder others. For example, Guiller et al. (2008)[36] found that, relative to face-to-face discourse, online discourse featured more justifications, while face-to-face discourse featured more instances of students expanding on what others had said. The increase in justifications may be due to the asynchronous nature of online discussions, while the increase in expanding comments may be due to the spontaneity of ‘real time’ discussion. Newman et al. (1995)[37] showed similar differential effects. They found that while CMC boasted more important statements and linking of ideas, it lacked novelty. The authors suggest that this may be due to difficulties participating in a brainstorming-style activity in an asynchronous environment. Rather, the asynchrony may promote users to put forth “considered, thought out contributions.”

Researchers assessing critical thinking in online discussion forums often employ a technique called Content Analysis,[37][36] where the text of online discourse (or the transcription of face-to-face discourse) is systematically coded for different kinds of statements relating to critical thinking. For example, a statement might be coded as “Discuss ambiguities to clear them up” or “Welcoming outside knowledge” as positive indicators of critical thinking. Conversely, statements reflecting poor critical thinking may be labeled as “Sticking to prejudice or assumptions” or “Squashing attempts to bring in outside knowledge.” The frequency of these codes in CMC and face-to-face discourse can be compared to draw conclusions about the quality of critical thinking.

Searching for evidence of critical thinking in discourse has roots in a definition of critical thinking put forth by Kuhn (1991),[38] which places more emphasis on the social nature of discussion and knowledge construction. There is limited research on the role of social experience in critical thinking development, but there is some evidence to suggest it is an important factor. For example, research has shown that 3- to 4-year-old children can discern, to some extent, the differential creditability[39] and expertise[40] of individuals. Further evidence for the impact of social experience on the development of critical thinking skills comes from work that found that 6- to 7-year-olds from China have similar levels of skepticism to 10- and 11-year-olds in the United States.[41] If the development of critical thinking skills was solely due to maturation, it is unlikely we would see such dramatic differences across cultures.

See also[edit]


  1. ^Edward M. Glaser. "Defining Critical Thinking". The International Center for the Assessment of Higher Order Thinking (ICAT, US)/Critical Thinking Community. Retrieved 2017-03-22. 
  2. ^Walters, Kerry (1994). Re-Thinking Reason. Albany: State University of New York Press. pp. 181–98. 
  3. ^Elkins, James R. "The Critical Thinking Movement: Alternating Currents in One Teacher's Thinking". myweb.wvnet.edu. Retrieved 23 March 2014. 
  4. ^"Critical Thinking Index Page". 
  5. ^"Defining Critical Thinking". 
  6. ^Brown, Lesley. (ed.) The New Shorter Oxford English Dictionary (1993) p. 551.
  7. ^ ab"Critical – Define Critical at Dictionary.com". Dictionary.com. Retrieved 2016-02-24. 
  8. ^"SSConceptionCT.html". 
  9. ^Facione, Peter A. (2011). "Critical Thinking: What It is and Why It Counts"(PDF). insightassessment.com. p. 26. 
  10. ^Mulnix, J. W. (2010). "Thinking critically about critical thinking". Educational Philosophy and Theory. 44: 471. doi:10.1111/j.1469-5812.2010.00673.x. 
  11. ^Carmichael, Kirby; letter to Olivetti, Laguna Salada Union School District, May 1997.
  12. ^"critical analysis". TheFreeDictionary.com. Retrieved 2016-11-30. 
  13. ^Walters, Kerry (1994). Re-Thinking Reason. Albany: State University of New York Press. 
  14. ^Reynolds, Martin (2011). Critical thinking and systems thinking: towards a critical literacy for systems thinking in practice. In: Horvath, Christopher P. and Forte, James M. eds. Critical Thinking. New York: Nova Science Publishers, pp. 37–68.
  15. ^Jones, Elizabeth A., & And Others (1995). National Assessment of College Student Learning: Identifying College Graduates' Essential Skills in Writing, Speech and Listening, and Critical Thinking. Final Project Report (NCES-95-001)(PDF). from National Center on Postsecondary Teaching, Learning, and Assessment, University Park, PA.; Office of Educational Research and Improvement (ED), Washington, DC.; U.S. Government Printing Office, Superintendent of Documents, Mail Stop: SSOP, Washington, DC 20402-9328. PUB TYPE - Reports Research/Technical (143) pp. 14–15. ISBN 0-16-048051-5. Retrieved 2016-02-24. 
  16. ^ abEdward M. Glaser (1941). An Experiment in the Development of Critical Thinking. New York, Bureau of Publications, Teachers College, Columbia University. ISBN 0-404-55843-7. 
  17. ^The National Assessment of College Student Learning: Identification of the Skills to be Taught, Learned, and Assessed, NCES 94–286, US Dept of Education, Addison Greenwood (Ed), Sal Carrallo (PI). See also, Critical thinking: A statement of expert consensus for purposes of educational assessment and instruction. ERIC Document No. ED 315–423
  18. ^"Research at Human Science Lab". Human Science Lab. Retrieved 5 March 2017. 
  19. ^Solomon, S.A. (2002) "Two Systems of Reasoning," in Heuristics and Biases: The Psychology of Intuitive Judgment, Govitch, Griffin, Kahneman (Eds), Cambridge University Press. ISBN 978-0-521-79679-8; Thinking and Reasoning in Human Decision Making: The Method of Argument and Heuristic Analysis, Facione and Facione, 2007, California Academic Press. ISBN 978-1-891557-58-3
  20. ^Research on Sociocultural Influences on Motivation and Learning, p. 46
  21. ^Walsh, Catherine, M. (2007). "California Critical Thinking Disposition Inventory: Further Factor Analytic Examination". SAGE. 104: 141–151. doi:10.2466/pms.104.1.141-151 – via SAGE. 
  22. ^Dewey, John. (1910). How we think. Lexington, MA: D.C. Heath & Co.
  23. ^Walters, Kerry. (1994). Re-Thinking Reason. Albany, NY: State University of New York Press.
  24. ^Critical Thinking FAQs from Oxford Cambridge and RSA ExaminationsArchived 11 April 2008 at the Wayback Machine.
  25. ^"Cambridge International AS and A Level subjects". 
  26. ^"New GCEs for 2008", Assessment and Qualifications Alliance Archived 17 February 2008 at the Wayback Machine.
  27. ^"Welcome to Al-Bairaq World". Archived from the original on 19 April 2014. Retrieved 5 July 2014. 
  28. ^Lion Gardiner, Redesigning Higher Education: Producing Dramatic Gains in Student Learning, in conjunction with: ERIC Clearinghouse on Higher Education, 1995
  29. ^ abAbrami, P. C., Bernard, R. M., Borokhovski, E., Waddington, D. I., Wade, C. A., & Persson, T. (2014). Strategies for Teaching Students to Think Critically: A Meta-Analysis. Review of Educational Research, 1–40
  30. ^Critical thinking is considered important in the academic fields because it enables one to analyze, evaluate, explain, and restructure their thinking, thereby decreasing the risk of adopting, acting on, or thinking with, a false belief.
  31. ^Lau, Joe; Chan, Jonathan. "[F08] Cognitive biases". Critical thinking web. Retrieved 2016-02-01. 
  32. ^"Critical Thinking, Moral Integrity and Citizenship". Criticalthinking.org. Retrieved 2016-02-01. 
  33. ^Catching the wave: understanding the concept of critical thinking (1999) doi:10.1046/j.1365-2648.1999.00925.x
  34. ^College of Nurses of Ontario – Professional Standards for Continuing Competencies (2006)
  35. ^"International Day for Tolerance . Declaration of Principles on Tolerance, Article 4, 3". UNESCO. Retrieved 2016-02-24. 
  36. ^ abGuiller, Jane; Durndell, Alan; Ross, Anne (2008). "Peer interaction and critical thinking: Face-to-face or online discussion?". Learning and Instruction. 18: 187–200. doi:10.1016/j.learninstruc.2007.03.001. 
  37. ^ abNewman, D R; Webb, Brian; Cochrane, Clive (1995). "A content analysis method to measure critical thinking in face-to-face and computer supported group learning". Interpersonal Computing and Technology. 3 (September 1993): 56–77. doi:10.1111/j.1365-2648.2007.04569.x. PMID 18352969. 
  38. ^Kuhn, D (1991). The skills of argument. Cambridge, UK: Cambridge University Press. 
  39. ^Koenig, M A; Harris, P L (2005). "Preschoolers mistrust ignorant and inaccurate speakers". Child Development. 76: 1261–77. doi:10.1111/j.1467-8624.2005.00849.x. 
  40. ^Lutz, D J; Keil, F C (2002). "Early understanding of the division of cognitive labor". Child Development. 73: 1073–84. doi:10.1111/1467-8624.00458. 
  41. ^Heyman, G D; Fu, G; Lee, K (2007). "Evaluating claims peoplemake about themselves: The development of skepticism". Child Development. 78: 367–75. doi:10.1111/j.1467-8624.2007.01003.x. 

Further reading[edit]

  • Cederblom, J & Paulsen, D.W. (2006) Critical Reasoning: Understanding and criticizing arguments and theories, 6th edn. (Belmont, CA, ThomsonWadsworth).
  • College of Nurses of Ontario Professional Standards (2006) – Continuing Competencies
  • Damer, T. Edward. (2005) Attacking Faulty Reasoning, 6th Edition, Wadsworth. ISBN 0-534-60516-8
  • Dauer, Francis Watanabe. Critical Thinking: An Introduction to Reasoning, 1989, ISBN 978-0-19-504884-1
  • Facione, P. 2007. Critical Thinking: What It Is and Why It Counts – 2007 Update
  • Fisher, Alec and Scriven, Michael. (1997) Critical Thinking: Its Definition and Assessment, Center for Research in Critical Thinking (UK) / Edgepress (US). ISBN 0-9531796-0-5
  • Hamby, B.W. (2007) The Philosophy of Anything: Critical Thinking in Context. Kendall Hunt Publishing Company, Dubuque Iowa. ISBN 978-0-7575-4724-9
  • Vincent F. Hendricks. (2005) Thought 2 Talk: A Crash Course in Reflection and Expression, New York: Automatic Press / VIP. ISBN 87-991013-7-8
  • Kompf, M., & Bond, R. (2001). Critical reflection in adult education. In T. Barer-Stein & M. Kompf(Eds.), The craft of teaching adults (pp. 21–38). Toronto, ON: Irwin.
  • McPeck, J. (1992). Thoughts on subject specificity. In S. Norris (Ed.), The generalizability of critical thinking (pp. 198–205). New York: Teachers College Press.
  • Moore, Brooke Noel and Parker, Richard. (2012) Critical Thinking. 10th ed. Published by McGraw-Hill. ISBN 0-07-803828-6.
  • Mulnix, J. W. (2010). "Thinking critically about critical thinking". Educational Philosophy and Theory. 44: 464–479. doi:10.1111/j.1469-5812.2010.00673.x. 
  • Paul, R (1982). "Teaching critical thinking in the strong sense: A focus on self-deception, world views and a dialectical mode of analysis". Informal Logic Newsletter. 4 (2): 2–7. 
  • Paul, Richard. (1995) Critical Thinking: How to Prepare Students for a Rapidly Changing World. 4th ed. Foundation for Critical Thinking. ISBN 0-944583-09-1.
  • Paul, Richard and Elder, Linda. (2006) Critical Thinking Tools for Taking Charge of Your Learning and Your Life, New Jersey: Prentice Hall Publishing. ISBN 0-13-114962-8.
  • Paul, Richard; Elder, Linda. (2002) Critical Thinking: Tools for Taking Charge of Your Professional and Personal Life. Published by Financial Times Prentice Hall. ISBN 0-13-064760-8.
  • Pavlidis, Periklis (2010). "Critical Thinking as Dialectics: a Hegelian–Marxist Approach". Journal for Critical Education Policy Studies. 8 (2). 
  • Sagan, Carl. (1995) The Demon-Haunted World: Science As a Candle in the Dark. Ballantine Books. ISBN 0-345-40946-9
  • Theodore Schick & Lewis Vaughn "How to Think About Weird Things: Critical Thinking for a New Age" (2010) ISBN 0-7674-2048-9
  • Twardy, Charles R. (2003) Argument Maps Improve Critical Thinking. Teaching Philosophy 27:2 June 2004.
  • van den Brink-Budgen, R (2010) 'Critical Thinking for Students', How To Books. ISBN 978-1-84528-386-5
  • Whyte, J. (2003) Bad Thoughts – A Guide to Clear Thinking, Corvo. ISBN 0-9543255-3-2.
  • Zeigarnik, B.V. (1927). On finished and unfinished tasks. In English translation Edited by Willis D. Ellis ; with an introduction by Kurt Koffka. (1997). A source book of gestalt psychology xiv, 403 p. : ill. ; 22 cmHighland, N.Y: Gestalt Journal Press. "This Gestalt Journal Press edition is a verbatim reprint of the book as originally published in 1938" – T.p. verso. ISBN 9780939266302. OCLC 38755142

External links[edit]

Media related to Critical thinking at Wikimedia Commons Quotations related to Critical thinking at Wikiquote

0 thoughts on “Uncritical Thinking Definition Wikipedia

Leave a Reply

Your email address will not be published. Required fields are marked *