“Thus mathematics may be defined as the subject in which we never know what we are talking about, nor whether what we are saying is true.”

—  Bertrand Russell

Source: 1910s, Mysticism and Logic and Other Essays http://archive.org/stream/mysticism00russuoft/mysticism00russuoft_djvu.txt (1918), Ch. 5: Mathematics and the Metaphysicians

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Bertrand Russell 562
logician, one of the first analytic philosophers and politi… 1872–1970

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