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Karl Popper : 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. # Philosophers and Philosophy # Mistakes # Knowledge

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Karl Popper quote-There are all kinds of sources of our knowledge; but none has authority...

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Daniel C Dennett : " The fundamental core of contemporary Darwinism, the theory of DNA-based reproduction and evolution, is now beyond dispute among scientists. It demonstrates its power every day, contributing crucially to the explanation of planet-sized facts of geology and meteorology, through middle-sized facts of ecology and agronomy, down to the latest microscopic facts of genetic engineering. It unifies all of biology and the history of our planet into a single grand story. Like Gulliver tied down in Lilliput, it is unbudgable, not because of some one or two huge chains of argument that might - hope against hope - have weak links in them, but because it is securely tied by thousands of threads of evidence anchoring it to virtually every other area of human knowledge. New discoveries may conceivably lead to dramatic, even "revolutionary" shifts in the Darwinian theory, but the hope that it will be "refuted" by some shattering breakthrough is about as reasonable as the hope that we will return to a geocentric vision and discard Copernicus. " # Philosophers and Philosophy # Mistakes # Knowledge

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Alfred Russel Wallace : " On the question of the "origin of species" Mr. Haughton enlarges considerably; but his chief arguments are reduced to the setting-up of "three unwarrantable assumptions," which he imputes to the Lamarckians and Darwinians, and then, to use his own words, "brings to the ground like a child's house of cards." The first of these is "the indefinite variation of species continuously in the one direction." Now this is certainly never assumed by Mr. Darwin, whose argument is mainly grounded on the fact that variations occur in every direction. This is so obvious that it hardly needs insisting on. In every large family there is almost always one child taller, one darker, one thinner than the rest; one will have a larger nose, another a larger eye: they vary morally as well; some are more poetical, others more morose; one has a genius for numbers, another for painting. It is the same in animals: the puppies, or kittens, or rabbits of one litter differ in many ways from each other - in colour, in size, in disposition; so that, though they do not "vary continuously in one direction," they do vary continuously in many directions; and thus there is always material for natural selection to act upon in some direction that may be advantageous. [...] I will only, in conclusion, quote from it a short paragraph which contains an important truth, but which may very fairly be applied in other quarters than those for which the author intended it: - "No progress in natural science is possible as long as men will take their rude guesses at truth for facts, and substitute the fancies of their imagination for the sober rules of reasoning." " # Philosophers and Philosophy # Mistakes # Knowledge

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Niels Bohr : " We are all agreed that your theory is crazy. The question that divides us is whether it is crazy enough to have a chance of being correct. " # Philosophers and Philosophy # Mistakes # Knowledge

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Cornel West : " The Enlightenment worldview held by Du Bois is ultimately inadequate, and, in many ways, antiquated, for our time. The tragic plight and absurd predicament of Africans here and abroad requires a more profound interpretation of the human condition — one that goes beyond the false dichotomies of expert knowledge vs. mass ignorance, individual autonomy vs. dogmatic authority, and self-mastery vs. intolerant tradition. " # Philosophers and Philosophy # Mistakes # Knowledge

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Benjamin Disraeli : " The question is this -- Is man an ape or an angel? My Lord, I am on the side of the angels. I repudiate with indignation and abhorrence these new fanged theories. " # Philosophers and Philosophy # Mistakes # Knowledge

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Angela Carter : " There's a theory, one I find persuasive, that the quest for knowledge is, at bottom, the search for the answer to the question: Where was I before I was born. In the beginning was what? Perhaps, in the beginning, there was a curious room, a room like this one, crammed with wonders; and now the room and all it contains are forbidden you, although it was made just for you, had been prepared for you since time began, and you will spend all your life trying to remember it. " # Philosophers and Philosophy # Mistakes # Knowledge

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Timothy Leary : " Think for yourself and question authority. " # Philosophers and Philosophy # Mistakes # Knowledge

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Alfred Korzybski : " ...a few philosophers really do important work. This applies to the so called 'critical philosophy' and to the theory of knowledge or epistemology. This class of workers I call epistemologists to avoid the disagreeable implications of the term 'philosopher'. " # Philosophers and Philosophy # Mistakes # Knowledge

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Stephen Jay Gould : " All interesting issues in natural history are questions of relative frequency, not single examples. Everything happens once amidst the richness of nature. But when an unanticipated phenomenon occurs again and again—finally turning into an expectation—then theories are overturned. " # Philosophers and Philosophy # Mistakes # Knowledge

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Alvin Toffler : " Knowledge is the most democratic source of power. " # Philosophers and Philosophy # Mistakes # Knowledge

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Karl Popper: " No rational argument will have a rational effect on a man who does not want to adopt a rational attitude." # Attitude # Reason # Argument

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Karl Popper: " 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 all argument; 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." # Freedom # Philosophers and Philosophy # Truth

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Karl Popper: " 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." # Leaders and Leadership # Failure # Problems

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Karl Popper: " 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." # Understanding # Communication # Leaders and Leadership

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Karl Popper: " 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." # Science and Scientists # Love # Truth

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Karl Popper: " 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." # Philosophers and Philosophy # Happiness # Politicians and Politics

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Karl Popper: " Science may be described as the art of systematic over-simplification." # Science and Scientists

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Karl Popper: " Good tests kill flawed theories; we remain alive to guess again." # Theory # Books - Reading # Love

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Karl Popper: " 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"." # Democracy # Government # Love

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Karl Popper: " 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 or not they are compatible with each other or realizable.)" # Despair # Technology # Science and Scientists

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