Quotes from book
Conjectures and Refutations

Conjectures and Refutations

Conjectures and Refutations is one of Karl Popper's most wide-ranging and popular works, notable not only for its acute insight into the way scientific knowledge grows, but also for applying those insights to politics and to history. It provides one of the clearest and most accessible statements of the fundamental idea that guided his work: not only our knowledge, but our aims and our standards, grow through an unending process of trial and error.


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“Science must begin with myths, and with the criticism of myths.”

Source: Conjectures and Refutations: The Growth of Scientific Knowledge (1963), Ch. 1 "Science : Conjectures and Refutations", Section VII

Karl Popper photo

“But science is one of the very few human activities — perhaps the only one — in which errors are systematically criticized and fairly often, in time, corrected.”

Source: Conjectures and Refutations: The Growth of Scientific Knowledge (1963), Ch. 1 "Science : Conjectures and Refutations"
Context: The history of science, like the history of all human ideas, is a history of irresponsible dreams, of obstinacy, and of error. But science is one of the very few human activities — perhaps the only one — in which errors are systematically criticized and fairly often, in time, corrected. This is why we can say that, in science, we often learn from our mistakes, and why we can speak clearly and sensibly about making progress there.

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

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

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

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

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