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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.

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
Think
Lead
Thinking
Along
Choose
Belief
Perish
Wrong
Leads
Freedom
Defeat
Must
Prepared
Always
Victory

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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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If you know that things are bound to happen whatever you do, then you may feel free to give up the fight against them.
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[To] interpret Parmenides as a Kant before Kant ... this is exactly what we must do.
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Good tests kill flawed theories we remain alive to guess again.
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There is no pure, disinterested, theory-free observation.
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A theory that explains everything, explains nothing
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There can be no ultimate statements science: there can be no statements in science which can not be tested, and therefore none which cannot in principle be refuted, by falsifying some of the conclusions which can be deduced from them.
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Those who promise us paradise on earth never produced anything but a hell.
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A theory which is not refutable by any conceivable event is non-scientific. Irrefutability is not a virtue of a theory (as people often think) but a vice.
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There is no history, only histories.
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Our knowledge can only be finite, while our ignorance must necessarily be infinite.
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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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The defence of democracy must consist in making anti-democratic experiences too costly for those who try them much more costly than a democratic compromise
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My thesis is that what we call 'science' is differentiated from the older myths not by being something distinct from a myth, but by being accompanied by a second-order tradition-that of critically discussing the myth. ... In a certain sense, science is myth-making just as religion is.
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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
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It is part of my thesis that all our knowledge grows only through the correcting of our mistakes.
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The old scientific ideal of episteme - of absolutely certain, demonstrable knowledge - has proved to be an idol. The demand for scientific objectivity makes it inevitable that every scientific statement must remain tentative for ever.
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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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No particular theory may ever be regarded as absolutely certain.... No scientific theory is sacrosanct.
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