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We should therefore claim, in the name of tolerance, the right not to tolerate the intolerant.

Karl Popper

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Karl Popper
Age: 92 †
Born: 1902
Born: July 28
Died: 1994
Died: September 17
Philosopher
Philosopher Of Science
Sociologist
University Teacher
Writer
Vienna
Austria
Karl Raimund Popper Sir
Karl Raimund
Sir Popper
Sir Karl Raimund Popper
Tolerate
Tolerance
Claim
Claims
Therefore
Name
Intolerant
Names
Disappearance
Right
Intolerance

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We have the right not to tolerate the intolerant. We should tolerate even them whenever we can do so without running a great risk but the risk may become so great that we cannot allow ourselves the luxury.
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Every genuine test of a theory is an attempt to falsify it, or to refute it.
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Man, some modern philosophers tell us, is alienated from his world: he is a stranger and afraid in a world he never made. Perhaps he is yet so are animals, and even plants. They too were born, long ago, into a physico-chemical world, a world they never made.
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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.
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The fundamental thing about human languages is that they can and should be used to describe something and this something is, somehow, the world. To be constantly and almost exclusively interested in the medium - in spectacle-cleaning - is a result of a philosophical mistake.
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A theory that explains everything, explains nothing
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The war of ideas is a Greek invention. It is one of the most important inventions ever made. Indeed, the possibility of fighting with with words and ideas instead of fighting with swords is the very basis of our civilization, and especially of all its legal and parliamentary institutions.
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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.
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We must plan for freedom, and not only for security, if for no other reason than only freedom can make security more secure.
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If you can't say it simply and clearly, keep quiet, and keep working on it till you can.
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In my view, aiming at simplicity and lucidity is a moral duty of all intellectuals: lack of clarity is a sin, and pretentiousness is a crime.
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Those who promise us paradise on earth never produced anything but a hell.
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Whenever we propose a solution to a problem, we ought to try as hard as we can to overthrow our solution, rather than defend it.
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Science must begin with myths, and with the criticism of myths.
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[To] interpret Parmenides as a Kant before Kant ... this is exactly what we must do.
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no matter how many instances of white swans we may have observed, this does not justify the conclusion that all swans are white.
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Criticism of my alleged views was widespread and highly successful. I have yet to meet a criticism of my views.
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Historically speaking all - or very nearly all - scientific theories originate from myths.
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There is no pure, disinterested, theory-free observation.
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A system is empirical or scientific only if it is capable of being tested by experience. These considerations suggest that not the verifiability but the falsifiability of a system is to be taken as a criterion of demarcation... It must be possible for an empirical or scientific system to be refuted by experience.
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