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"13 Karl Popper Quotes & Sayings

      British     /     View profile
Born: 28 July 1902. Died: 17 September 1994 | Philosopher | Academic |

It is impossible to speak in such a way that you cannot be misunderstood.

Cannot Impossible Misunderstood Speak
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Our knowledge can only be finite, while our ignorance must necessarily be infinite.
Finite Ignorance Infinite Knowledge
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No rational argument will have a rational effect on a man who does not want to adopt a rational attitude.

Adopt Argument Attitude Does
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Those who promise us paradise on earth never produced anything but a hell.

Anything Earth Hell Never
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Science may be described as the art of systematic over-simplification.
Art May Science Systematic
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Good tests kill flawed theories; we remain alive to guess again.

Again Alive Flawed Good
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Science must begin with myths, and with the criticism of myths.

Begin Criticism Must Myths
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We have become makers of our fate when we have ceased to pose as its prophets.

Become Fate Makers Our
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We must plan for freedom, and not only for security, if for no other reason than that only freedom can make security secure.

Freedom Make Must Only
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Piecemeal social engineering resembles physical engineering in regarding the ends as beyond the province of technology.

Beyond Ends Engineering Physical
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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.

About Does Far Must
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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.

Aspects Elevated Histories History
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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.

Appears Intended Neither Nor
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Karl Popper Quotes & Sayings