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Ideas for 'Logical Consequence', 'Causal and Metaphysical Necessity' and 'Remarks on axiomatised set theory'

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6. Mathematics / B. Foundations for Mathematics / 1. Foundations for Mathematics

17880

Integers and induction are clear as foundations, but set-theory axioms certainly aren't [Skolem]

6. Mathematics / B. Foundations for Mathematics / 2. Proof in Mathematics

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Hilbert proofs have simple rules and complex axioms, and natural deduction is the opposite [Beall/Restall]