"The whole problem with the world is that fools and fanatics are always so certain of themselves, and wiser people so full of doubts."
"... mathematical knowledge ... is, in fact, merely verbal knowledge. "3" means "2+1", and "4" means "3+1". Hence it follows (though the proof is long) that "4" means the same as "2+2". Thus mathematical knowledge ceases to be mysterious."
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Source: Bertrand Russell (2016). “Mysticism and Logic”, p.75, Bertrand Russell
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