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Ideas for 'Dthat', 'Remarks on axiomatised set theory' and 'Posterior Analytics'

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2 ideas

4. Formal Logic / B. Propositional Logic PL / 2. Tools of Propositional Logic / e. Axioms of PL

1668	An axiom is a principle which must be understood if one is to learn anything [Aristotle]

4. Formal Logic / F. Set Theory ST / 4. Axioms for Sets / a. Axioms for sets

17879

Axiomatising set theory makes it all relative [Skolem]