Combining Texts

Ideas for 'Ethical Studies', 'What is Logic?' and 'On the General Idea of Proof Theory'

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2 ideas

5. Theory of Logic / J. Model Theory in Logic / 1. Logical Models

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Model theory looks at valid sentences and consequence, but not how we know these things [Prawitz]

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]