👓 Paradox of tolerance | Wikipedia

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The paradox of tolerance is a paradox that states that if a society is tolerant without limit, its ability to be tolerant is eventually seized or destroyed by the intolerant. Karl Popper first described it in 1945—expressing the seemingly paradoxical idea that, "In order to maintain a tolerant society, the society must be intolerant of intolerance."

Finished reading Induction and Intuition in Scientific Thought by P.B. Medawar

Originally published in 1969. This book explains what is wrong with the traditional methodology of “inductive” reasoning and shows that the alternative scheme of reasoning associated with Whewell, Pierce and Popper can give the scientist a useful insight into the way he thinks.