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Ideas for 'Logical Consequence', 'Treatise of Human Nature' and 'works'

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

10692

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

6. Mathematics / B. Foundations for Mathematics / 5. Definitions of Number / d. Hume's Principle

8649	Two numbers are equal if all of their units correspond to one another [Hume]