„Pure mathematics consists entirely of assertions to the effect that, if such and such a proposition is true of anything, then such and such another proposition is true of that thing. It is essential not to discuss whether the first proposition is really true, and not to mention what the anything is, of which it is supposed to be true.“ (p 114) #Russell #PureMathematics
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Russell, Bertrand, Mysticism and Logic and Other Essays. London: George Allen & Unwin LTD 111959.