Combining Philosophers

Ideas for Melvin Fitting, George Boolos and Gottfried Leibniz

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2 ideas

5. Theory of Logic / D. Assumptions for Logic / 3. Contradiction

2111	Falsehood involves a contradiction, and truth is contradictory of falsehood [Leibniz]

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

10697

Identity is clearly a logical concept, and greatly enhances predicate calculus [Boolos]