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Ideas for 'works', 'The Establishment of Scientific Semantics' and 'Mathematical Methods in Philosophy'

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5. Theory of Logic / A. Overview of Logic / 6. Classical Logic

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A language: primitive terms, then definition rules, then sentences, then axioms, and finally inference rules [Tarski]

5. Theory of Logic / A. Overview of Logic / 9. Philosophical Logic

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Three stages of philosophical logic: syntactic (1905-55), possible worlds (1963-85), widening (1990-) [Horsten/Pettigrew]