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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.

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
Without
Whenever
Right
Allow
Great
Atheism
Even
Risk
Running
Cannot
Intolerant
Become
Tolerate
May
Luxury

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Thus science must begin with myths, and with the criticism of myths neither with the collection of observations, nor with the invention of experiments, but with the critical discussion of myths, and of magical techniques and practices.
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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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No particular theory may ever be regarded as absolutely certain.... No scientific theory is sacrosanct.
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The future is always present, as a promise, a lure and a temptation.
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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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The influence (for good or ill) of Plato's work is immeasurable. Western thought, one might say, has been Platonic or anti-Platonic, but hardly ever non-Platonic.
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Now this principle of induction cannot be a purely logical truth like a tautology or an analytic statement. . . .
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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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We should therefore claim, in the name of tolerance, the right not to tolerate the intolerant.
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Ignorance is not a simple lack of knowledge but an active aversion to knowledge, the refusal to know, issuing from cowardice, pride, or laziness of mind.
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The best thing that can happen to a human being us to find a problem, to fall in love with that problem, and to live trying to solve that problem, unless another problem even more lovable appears.
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The survival value of intelligence is that it allows us to extinct a bad idea, before the idea extincts us.
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. . . it seems to me certain that more people are killed out of righteous stupidity than out of wickedness.
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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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Science must begin with myths, and with the criticism of myths.
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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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Propose theories which can be criticized. Think about possible decisive falsifying experiments-crucial experiments. But do not give up your theories too easily-not, at any rate, before you have critically examined your criticism.
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Reason like science, grows by way of mutual criticism the only possible way of planning its growth is to develop those institutions that safeguard. the freedom of thought
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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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There is no pure, disinterested, theory-free observation.
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