Combining Philosophers
Ideas for Euclid, Thrasymachus and Bernard Bolzano
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2 ideas
4. Formal Logic / C. Predicate Calculus PC / 2. Tools of Predicate Calculus / c. Derivations rules of PC
13907
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If you pick an arbitrary triangle, things proved of it are true of all triangles [Euclid, by Lemmon]
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4. Formal Logic / F. Set Theory ST / 1. Set Theory
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An aggregate in which order does not matter I call a 'set' [Bolzano]
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