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Ideas for 'fragments/reports', 'The Work of a Free Person' and 'Begriffsschrift'

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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 / C. Predicate Calculus PC / 1. Predicate Calculus PC

4971	I don't use 'subject' and 'predicate' in my way of representing a judgement [Frege]

4. Formal Logic / C. Predicate Calculus PC / 2. Tools of Predicate Calculus / d. Universal quantifier ∀

17745

For Frege, 'All A's are B's' means that the concept A implies the concept B [Frege, by Walicki]