Combining Philosophers
Ideas for Rescher,N/Oppenheim,P, Harold Hodes and Charles Chihara
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5 ideas
5. Theory of Logic / A. Overview of Logic / 7. Second-Order Logic
10015
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Higher-order logic may be unintelligible, but it isn't set theory [Hodes]
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5. Theory of Logic / D. Assumptions for Logic / 4. Identity in Logic
10011
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Identity is a level one relation with a second-order definition [Hodes]
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5. Theory of Logic / E. Structures of Logic / 6. Relations in Logic
9561
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The mathematics of relations is entirely covered by ordered pairs [Chihara]
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5. Theory of Logic / I. Semantics of Logic / 1. Semantics of Logic
10016
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When an 'interpretation' creates a model based on truth, this doesn't include Fregean 'sense' [Hodes]
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5. Theory of Logic / K. Features of Logics / 2. Consistency
9552
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Sentences are consistent if they can all be true; for Frege it is that no contradiction can be deduced [Chihara]
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