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Ideas for 'works', 'Relativism' and 'Model Theory'

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5. Theory of Logic / A. Overview of Logic / 5. First-Order Logic

10478

Since first-order languages are complete, |= and |- have the same meaning [Hodges,W]

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

4705	Logical relativism appears if we allow more than one legitimate logical system [O'Grady]