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Ideas for 'What is Logic?st1=Ian Hacking', 'Explanation and Reference' and 'Putnam's Paradox'

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2 ideas

5. Theory of Logic / J. Model Theory in Logic / 2. Isomorphisms

14212

A consistent theory just needs one model; isomorphic versions will do too, and large domains provide those [Lewis]

5. Theory of Logic / J. Model Theory in Logic / 3. Löwenheim-Skolem Theorems

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If it is a logic, the Löwenheim-Skolem theorem holds for it [Hacking]