Karl Popper idézet

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Karl Popper

Születési dátum: 28. július 1902
Halál dátuma: 17. szeptember 1994

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.

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

—  Karl Popper

Forrás: Simon Singh: A Nagy Bumm. Park Könyvkiadó Kft., 2006. p. 11. ISBN 978-963-530-725-8

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„A principle of induction would be a statement with the help of which we could put inductive inferences into a logically acceptable form.“

—  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
Kontextus: A principle of induction would be a statement with the help of which we could put inductive inferences into a logically acceptable form. In the eyes of the upholders of inductive logic, a principle of induction is of supreme importance for scientific method: "… this principle", says Reichenbach, "determines the truth of scientific theories. To eliminate it from science would mean nothing less than to deprive science of the power to decide the truth or falsity of its theories. Without it, clearly, science would no longer have the right to distinguish its theories from the fanciful and arbitrary creations of the poet's mind."
Now this principle of induction cannot be a purely logical truth like a tautology or an analytic statement. Indeed, if there were such a thing as a purely logical principle of induction, there would be no problem of induction; for in this case, all inductive inferences would have to be regarded as purely logical or tautological transformations, just like inferences in inductive logic. Thus the principle of induction must be a synthetic statement; that is, a statement whose negation is not self-contradictory but logically possible. So the question arises why such a principle should be accepted at all, and how we can justify its acceptance on rational grounds.

„By reluctance to criticize some of it, we may help to destroy it all.“

—  Karl Popper, könyv The Open Society and Its Enemies

Preface to the First Edition
The Open Society and Its Enemies (1945)
Kontextus: If in this book harsh words are spoken about some of the greatest among the intellectual leaders of mankind, my motive is not, I hope, the wish to belittle them. It springs rather from my conviction that, if our civilization is to survive, we must break with the habit of deference to great men. Great men may make great mistakes; and as the book tries to show, some of the greatest leaders of the past supported the perennial attack on freedom and reason. Their influence, too rarely challenged, continues to mislead those on whose defence civilization depends, and to divide them. The responsibility of this tragic and possibly fatal division becomes ours if we hesitate to be outspoken in our criticism of what admittedly is a part of our intellectual heritage. By reluctance to criticize some of it, we may help to destroy it all.

„The true Enlightenment thinker, the true rationalist, never wants to talk anyone into anything. No, he does not even want to convince; all the time he is aware that he may be wrong.“

—  Karl Popper

On Freedom (1958)
Kontextus: The true Enlightenment thinker, the true rationalist, never wants to talk anyone into anything. No, he does not even want to convince; all the time he is aware that he may be wrong. Above all, he values the intellectual independence of others too highly to want to convince them in important matters. He would much rather invite contradiction, preferably in the form of rational and disciplined criticism. He seeks not to convince but to arouse — to challenge others to form free opinions.

„Lorem ipsum dolor sit amet, consectetuer adipiscing elit. Etiam egestas wisi a erat. Morbi imperdiet, mauris ac auctor dictum.“

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