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Critical Quest for Truth – Quote by Karl Popper

„It is not his possession of knowledge, of irrefutable truth, that makes the man of science, but his persistent and recklessly critical quest for truth.“

Karl PopperKarl Popper on science: The scientist is defined not by possessing knowledge, but by the persistent and critical pursuit of truth.
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Karl Popper was an Austrian-British philosopher and the founder of critical rationalism.

Karl Popper emphasizes that scientific thinking is defined by the critical pursuit of truth rather than possession of infallible knowledge.


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Quote image featuring Karl Popper's perspective on the critical quest for truth

Sir Karl Raimund Popper (1902–1994) was an Austrian-British philosopher. Through his work in the philosophy of knowledge and science, as well as in social, historical, and political philosophy, he shaped critical rationalism. He also served as a professor of logic and scientific methods.

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"The quest for certainty blocks the search for meaning. Uncertainty is the very condition to impel man to unfold his powers." Erich Fromm
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Quote by Sam Harris on the importance of intellectual honesty in scienceCopyright © yoice.net – Quote Artwork
1. February 2026
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"The core of science is not controlled experiment or mathetical modeling; it is intellectual honesty. It is time we acknowledge a basic feature of human discourse: when considering the truth of a proposition, one is either engaged in an honest appraisal of the evidence and logical arguments, or one isn't." Sam Harris
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Thomas Kuhn quote about scientific discoveries and solving problems through scienceCopyright © yoice.net – Quote Artwork
9. September 2022
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"The man who is striving to solve a problem defined by existing knowledge and technique is not, however, just looking around. He knows what he wants to achieve, and he designs his instruments and directs his thoughts accordingly. Unanticipated novelty, the new discovery, can emerge only to the extent that his anticipations about nature and his instruments prove wrong... There is no other effective way in which discoveries might be generated." Thomas Kuhn
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Quote about embracing truth in science by John Frederick William HerschelCopyright © yoice.net – Quote Artwork
23. February 2022
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"In entering upon any scientific pursuit, one of the student’s first endeavours ought to be, to prepare his mind for the reception of truth, by dismissing, or at least loosening his hold on, all such crude and hastily adopted notions respecting the objects and relations he is about to examine as may tend to embarrass or mislead him.; and to strengthen himself, by something of an effort and a resolve, for the unprejudiced admission of any conclusion which shall appear to be supported by careful observation and logical argument, even should it prove of a nature adverse to notions he may have previously formed for himself, or taken up, without examination, on the credit of others." John Frederick William Herschel
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Ayn Rand quote about truth and those who seek itCopyright © yoice.net – Quote Artwork
7. August 2025
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"The truth is not for all men, but only for those who seek it." Ayn Rand
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Quote by Richard Feynman explaining why science is not dogma and the importance of questioning scientific claims.Copyright © yoice.net – Quote Artwork
26. May 2023
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"Science alone of all the subjects contains within itself the lesson of the danger of belief in the infallibility of the greatest teachers in the preceding generation (…) When someone says, “Science teaches such and such,” he is using the word incorrectly. Science doesn’t teach anything; experience teaches it. If they say to you, “Science has shown such and such,” you might ask, “How does science show it? How did the scientists find out? How? What? Where?” It should not be “science has shown” but “this experiment, this effect, has shown.” And you have as much right as anyone else, upon hearing about the experiments–but be patient and listen to all the evidence–to judge whether a sensible conclusion has been arrived at. (…) The experts who are leading you may be wrong. (…) I think we live in an unscientific age in which almost all the buffeting of communications and television-words, books, and so on-are unscientific. As a result, there is a considerable amount of intellectual tyranny in the name of science." Richard Phillips Feynman
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