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Ideas for 'fragments/reports', 'Ambitious, yet modest, Metaphysics' and 'Elements of Geometry'

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4. Formal Logic / B. Propositional Logic PL / 1. Propositional Logic

8077	Stoic propositional logic is like chemistry - how atoms make molecules, not the innards of atoms [Chrysippus, by Devlin]

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

20791

Chrysippus has five obvious 'indemonstrables' of reasoning [Chrysippus, by Diog. Laertius]

4. Formal Logic / C. Predicate Calculus PC / 2. Tools of Predicate Calculus / c. Derivations rules of PC

13907

If you pick an arbitrary triangle, things proved of it are true of all triangles [Euclid, by Lemmon]