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Ideas for 'fragments/reports', 'Substances without Substrata' and 'Naming and Necessity lectures'

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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 / D. Modal Logic ML / 1. Modal Logic

10559

Kripke's modal semantics presupposes certain facts about possible worlds [Kripke, by Zalta]