Karl Popper idézet
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Sir Karl Raimund Popper osztrák származású angol-zsidó filozófus. Fő eredményeket a tudományfilozófia, az ismeretelmélet és a politikafilozófia területén ért el. Kritizálta a tudomány induktív felfogását, és e helyett a cáfolást, a megkérdőjelezést, a „falszifikációt” jelölte meg a tudományosság kritériumaként, amely az áltudománytól megkülönbözteti . A politikafilozófia területén a liberális demokrácia, a „nyílt társadalom” híve és a kommunizmus, a marxizmus bírálója. Wikipedia  

✵ 28. július 1902 – 17. szeptember 1994
Karl Popper fénykép
Karl Popper: 101   idézetek 0   Kedvelés

Karl Popper híres idézetei

„A tudománynak a mítoszokkal és a mítoszok kritikájával kell megszületnie.”

Három nézet az emberi tudásról http://nyitottegyetem.phil-inst.hu/tudfil/ktar/forr_ed/Popper.htm
Forrás: Simon Singh: A Nagy Bumm. Park Könyvkiadó Kft., 2006. p. 11. ISBN 978-963-530-725-8

Karl Popper Idézetek a tudományról

Karl Popper idézetek

„Falszifikációink tehát éppen azokat a pontokat jelzik, ahol érintkezésbe kerültünk a valósággal.”

Három nézet az emberi tudásról http://nyitottegyetem.phil-inst.hu/tudfil/ktar/forr_ed/Popper.htm

Karl Popper: Idézetek angolul

“Good tests kill flawed theories; we remain alive to guess again.”

As quoted in My Universe : A Transcendent Reality (2011) by Alex Vary, Part II

“We must plan for freedom, and not only for security, if for no other reason than that only freedom can make security secure.”

Karl Popper könyv The Open Society and Its Enemies

Vol. 2, Ch. 21 "An Evaluation of the Prophecy"
The Open Society and Its Enemies (1945)

“SPAN ID=What_we_should_do> What we should do, I suggest, is to give up the idea of ultimate sources of knowledge, and admit that all knowledge is human; that it is mixed with our errors, our prejudices, our dreams, and our hopes; that all we can do is to grope for truth even though it be beyond our reach. We may admit that our groping is often inspired, but we must be on our guard against the belief, however deeply felt, that our inspiration carries any authority, divine or otherwise. If we thus admit that there is no authority beyond the reach of criticism to be found within the whole province of our knowledge, however far it may have penetrated into the unknown, then we can retain, without danger, the idea that truth is beyond human authority. And we must retain it. For without this idea there can be no objective standards of inquiry; no criticism of our conjectures; no groping for the unknown; no quest for knowledge. </SPAN”

Introduction "On The Sources of Knowledge and of Ignorance" Section XVII, p. 30 Variant translation: I believe it is worthwhile trying to discover more about the world, even if this only teaches us how little we know. It might do us good to remember from time to time that, while differing widely in the various little bits we know, in our infinite ignorance we are all equal.
If we thus admit that there is no authority beyond the reach of criticism to be found within the whole province of our knowledge, however far we may have penetrated into the unknown, then we can retain, without risk of dogmatism, the idea that truth itself is beyond all human authority. Indeed, we are not only able to retain this idea, we must retain it. For without it there can be no objective standards of scientific inquiry, no criticism of our conjectured solutions, no groping for the unknown, and no quest for knowledge.
Conjectures and Refutations: The Growth of Scientific Knowledge (1963)

“We may become the makers of our fate when we have ceased to pose as its prophets.”

Karl Popper könyv The Open Society and Its Enemies

Introduction
The Open Society and Its Enemies (1945)

“It seems to me certain that more people are killed out of righteous stupidity than out of wickedness.”

Forrás: Conjectures and Refutations: The Growth of Scientific Knowledge (1963), p. 368

“No rational argument will have a rational effect on a man who does not want to adopt a rational attitude.”

Karl Popper könyv The Open Society and Its Enemies

Vol. 2, Ch. 24 "Oracular Philosophy and the Revolt against Reason"
The Open Society and Its Enemies (1945)

“… The answer to this problem is: as implied by Hume, we certainly are not justified in reasoning from an instance to the truth of the corresponding law. But to this negative result a second result, equally negative, may be added: we are justified in reasoning from a counterinstance to the falsity of the corresponding universal law (that is, of any law of which it is a counterinstance). Or in other words, from a purely logical point of view, the acceptance of one counterinstance to 'All swans are white' implies the falsity of the law 'All swans are white' - that law, that is, whose counterinstance we accepted. Induction is logically invalid; but refutation or falsification is a logically valid way of arguing from a single counterinstance to - or, rather, against - the corresponding law. This shows that I continue to agree with Hume's negative logical result; but I extend it. This logical situation is completely independent of any question of whether we would, in practice, accept a single counterinstance - for example, a solitary black swan - in refutation of a so far highly successful law. I do not suggest that we would necessarily be so easily satisfied; we might well suspect that the black specimen before us was not a swan.”

Karl Popper könyv The Logic of Scientific Discovery

Forrás: The Logic of Scientific Discovery (1934), Ch. 1 "A Survey of Some Fundamental Problems", Section I: The Problem of Induction http://dieoff.org/page126.htm p. 27

“Science may be described as the art of systematic over-simplification — the art of discerning what we may with advantage omit.”

Karl Popper könyv The Open Universe

The Open Universe : An Argument for Indeterminism (1992), p. 44

“Piecemeal social engineering resembles physical engineering in regarding the ends as beyond the province of technology.”

Karl Popper könyv The Poverty of Historicism

All that technology may say about ends is whether they are compatible with each other or realizable.
The Poverty of Historicism (1957) Ch. 22 The Unholy Alliance with Utopianism

“If the many, the specialists, gain the day, it will be the end of science as we know it - of great science. It will be a spiritual catastrophe comparable in its consequences to nuclear armament.”

K. Popper, The Myth of the Framework, London: Routledge. As quoted in The Cambridge Companion to Karl Popper https://books.google.it/Brooks?id=ha6yDAAQBAJ&of=PA173 (2016) by J. Shearmur, G. Stokes

“...non-reproducible single occurrences are of no significance to science.”

Karl Popper könyv The Logic of Scientific Discovery

Forrás: The Logic of Scientific Discovery (1934), Ch. 4 "Falsifiability", Section XXII: Falsifiability and Falsification. p. 66.

“Besides, we should never attempt to balance anybody's misery against somebody else's happiness.”

Karl Popper könyv Conjectures and Refutations

Forrás: Conjectures and Refutations: The Growth of Scientific Knowledge (1963), pp. 486-487

“Do not allow your dreams of a beautiful world to lure you away from the claims of men who suffer here and now.”

Karl Popper könyv Conjectures and Refutations

Forrás: Conjectures and Refutations: The Growth of Scientific Knowledge (1963), p. 485

“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.”

Principle attributed to Popper by Ryszard Kapiscinski in New York Times obituary, 1995.
Misattributed
Forrás: https://www.nytimes.com/1995/01/01/magazine/lives-well-lived-karl-popper-the-philosopher-as-giantslayer.html