Combining Philosophers

Ideas for W Wimsatt/W Beardsley, Fred Sommers and E Reck / M Price

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5 ideas

5. Theory of Logic / D. Assumptions for Logic / 4. Identity in Logic

18897

Predicate logic has to spell out that its identity relation '=' is an equivalent relation [Sommers]

5. Theory of Logic / E. Structures of Logic / 1. Logical Form

18893

Translating into quantificational idiom offers no clues as to how ordinary thinkers reason [Sommers]

5. Theory of Logic / E. Structures of Logic / 2. Logical Connectives / c. not

18903

Sommers promotes the old idea that negation basically refers to terms [Sommers, by Engelbretsen]

5. Theory of Logic / E. Structures of Logic / 7. Predicates in Logic

18894

Predicates form a hierarchy, from the most general, down to names at the bottom [Sommers]

5. Theory of Logic / G. Quantification / 5. Second-Order Quantification

10175

Three types of variable in second-order logic, for objects, functions, and predicates/sets [Reck/Price]