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Ideas for 'fragments/reports', 'Frege Philosophy of Language (2nd ed)' and 'Principle Doctrines ('Kuriai Doxai') (frags)'

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4 ideas

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 / F. Set Theory ST / 2. Mechanics of Set Theory / c. Basic theorems of ST

10537

The ordered pairs <x,y> can be reduced to the class of sets of the form {{x},{x,y}} [Dummett]

4. Formal Logic / F. Set Theory ST / 4. Axioms for Sets / j. Axiom of Choice IX

10542

To associate a cardinal with each set, we need the Axiom of Choice to find a representative [Dummett]