Karl Popper Quotes

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Sir Karl Popper

Karl Popper c. 1980s
Born Karl Raimund Popper
(1902-07-28)28 July 1902
Vienna, Austria-Hungary
Died 17 September 1994(1994-09-17) (aged 92)
London, England, United Kingdom
Nationality Austrian
Alma mater University of Vienna
Era 20th-century philosophy
Region Western philosophy

Critical rationalism

Main interests

Philosophy of science
Social and political philosophy
Philosophy of mind
Origin of life
Interpretation of Quantum mechanics

Notable ideas

Bold hypothesis
Critical rationalism
Evolutionary trial and error view of the growth of knowledge
Propensity interpretation
Open society
Cosmological pluralism
Modified essentialism
Axiomatization of probability
Active Darwinism
Spearhead model of evolution
Objective hermeneutics
The paradox of tolerance
Critical dualism (of facts and standards)
Experimental corroboration as an indicator of verisimilitude/truthlikeness
Basissatz (basic statement)
Popper’s experiment
The historicism–historism distinction
Negative utilitarianism

No rational argument will have a rational effect on a man who does not want to adopt a rational attitude.
Karl Popper
Whenever a theory appears to you as the only possible one, take this as a sign that you have neither understood the theory nor the problem which it was intended to solve.
Karl Popper
Piecemeal social engineering resembles physical engineering in regarding the ends as beyond the province of technology.
Karl Popper
Science must begin with myths, and with the criticism of myths.
Good tests kill flawed theories; we remain alive to guess again.
Our knowledge can only be finite, while our ignorance must necessarily be infinite.
Karl Popper
We have become makers of our fate when we have ceased to pose as its prophets.
Karl Popper
It is impossible to speak in such a way that you cannot be misunderstood.
There is no history of mankind, there are only many histories of all kinds of aspects of human life. And one of these is the history of political power. This is elevated into the history of the world.
Karl Popper
Science may be described as the art of systematic over-simplification.
In so far as a scientific statement speaks about reality, it must be falsifiable; and in so far as it is not falsifiable, it does not speak about reality.
Karl Popper
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
Those who promise us paradise on earth never produced anything but a hell.