“Man is a rational animal – so at least I have been told.”

Often paraphrased as "It has been said that man is a rational animal. All my life I have been searching for evidence which could support this."
1950s, Unpopular Essays (1950)
Context: Man is a rational animal – so at least I have been told. Throughout a long life, I have looked diligently for evidence in favor of this statement, but so far I have not had the good fortune to come across it, though I have searched in many countries spread over three continents.

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Do you have more details about the quote "Man is a rational animal – so at least I have been told." by Bertrand Russell?
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Bertrand Russell 562
logician, one of the first analytic philosophers and politi… 1872–1970

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