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Ideas for 'works', 'Introduction to the Philosophy of Mind' and 'Perpetual Peace'

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2 ideas

5. Theory of Logic / G. Quantification / 2. Domain of Quantification

17743

De Morgan introduced a 'universe of discourse', to replace Boole's universe of 'all things' [De Morgan, by Walicki]

5. Theory of Logic / I. Semantics of Logic / 1. Semantics of Logic

6653	Syntactical methods of proof need only structure, where semantic methods (truth-tables) need truth [Lowe]