Karl Raimund Popper foi um filósofo da ciência austríaco naturalizado britânico. É considerado por muitos como o filósofo mais influente do século XX a tematizar a ciência . Foi também um filósofo social e político de importância considerável, um grande defensor da democracia liberal e um oponente implacável do totalitarismo.
Ele é talvez mais bem conhecido pela sua defesa do falsificacionismo como um critério da demarcação entre a ciência e a não-ciência, e pela sua defesa da sociedade aberta.
“Não sabemos. Só podemos conjeturar.”
citado em "Processos e métodos: relatório final" - Página 47, Hernani Aquini Fernandes Chaves, Petróleo Brasileiro, S.A. - Petrobrás, Centro de Pesquisas e Desenvolvimento, Divisão de Informação Técnica e Propriedade Industrial, 1983 - 113 páginas
Fonte: Livro "A Sociedade Aberta e os seus inimigos"
citado em "Filosofia Do Direito E Justiça" - Página 115, Andityas Soares de Moura Costa Matos, Editora del Rey, 2006, ISBN 8573088745, 9788573088748
Si nous étendons la tolérance illimitée même à ceux qui sont intolérants, si nous ne sommes pas disposés à défendre une société tolérante contre l'impact de l'intolérant, alors le tolérant sera détruit, et la tolérance avec lui.
Karl Popper; The Paradox of Tolerance, Karl Popper, The Open Society and Its Enemies, Vol. I, Chapt. 7, n.4, at 265 (Princeton University Press 1971)
“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
Vol. 2, Ch. 21 "An Evaluation of the Prophecy"
The Open Society and Its Enemies (1945)
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)
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.”
Introduction
The Open Society and Its Enemies (1945)
As quoted in "At 90, and Still Dynamic : Revisiting Sir Karl Popper and Attending His Birthday Party" by Eugene Yue-Ching Ho, in Intellectus 23 (Jul-Sep 1992) http://www.eeng.dcu.ie/~tkpw/hk-ies/n23a/
Fonte: Conjectures and Refutations: The Growth of Scientific Knowledge (1963), p. 368
As quoted in "At 90, and Still Dynamic : Revisiting Sir Karl Popper and Attending His Birthday Party" by Eugene Yue-Ching Ho, in Intellectus 23 (Jul-Sep 1992)
Johann Wolfgang von Goethe in "Israel in the Desert" (1819)
Misattributed
Vol. 2, Ch. 24 "Oracular Philosophy and the Revolt against Reason"
The Open Society and Its Enemies (1945)
Fonte: 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
As quoted in Popper (1973) by Bryan Magee
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
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
Fonte: Epistemology Without A Knowing Subject (1967)
“...non-reproducible single occurrences are of no significance to science.”
Fonte: 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.”
Fonte: Conjectures and Refutations: The Growth of Scientific Knowledge (1963), pp. 486-487
Fonte: Conjectures and Refutations: The Growth of Scientific Knowledge (1963), p. 485
Principle attributed to Popper by Ryszard Kapiscinski in New York Times obituary, 1995.
Misattributed
Fonte: https://www.nytimes.com/1995/01/01/magazine/lives-well-lived-karl-popper-the-philosopher-as-giantslayer.html
