Combining Texts

Ideas for 'Function and Concept', 'Discipline and Punish' and 'Reason, Truth and History'

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4 ideas

5. Theory of Logic / E. Structures of Logic / 5. Functions in Logic

8490	First-level functions have objects as arguments; second-level functions take functions as arguments [Frege]

5. Theory of Logic / E. Structures of Logic / 6. Relations in Logic

8492	Relations are functions with two arguments [Frege]

5. Theory of Logic / I. Semantics of Logic / 6. Intensionalism

14203

Intension is not meaning, as 'cube' and 'square-faced polyhedron' are intensionally the same [Putnam]

5. Theory of Logic / J. Model Theory in Logic / 2. Isomorphisms

14207

If cats equal cherries, model theory allows reinterpretation of the whole language preserving truth [Putnam]