Combining Texts
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'Function and Concept' and 'The Tarskian Turn'
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3 ideas
5. Theory of Logic / E. Structures of Logic / 5. Functions in Logic
8490
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First-level functions have objects as arguments; second-level functions take functions as arguments [Frege]
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5. Theory of Logic / E. Structures of Logic / 6. Relations in Logic
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Relations are functions with two arguments [Frege]
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5. Theory of Logic / E. Structures of Logic / 8. Theories in Logic
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A theory is 'non-conservative' if it facilitates new mathematical proofs [Horsten]
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