Combining Texts

Ideas for 'fragments/reports', 'The Theory of Relativity and A Priori Knowledge' and 'Frege versus Cantor and Dedekind'

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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 / 3. Types of Set / b. Empty (Null) Set

9986	The null set was doubted, because numbering seemed to require 'units' [Tait]

4. Formal Logic / F. Set Theory ST / 7. Natural Sets

9984	We can have a series with identical members [Tait]