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Ideas for 'works', 'Modal Logics and Philosophy' and 'Thinking About Mathematics'

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3 ideas

5. Theory of Logic / B. Logical Consequence / 7. Strict Implication

7789	Necessary implication is called 'strict implication'; if successful, it is called 'entailment' [Girle]

5. Theory of Logic / D. Assumptions for Logic / 2. Excluded Middle

8729	Intuitionists deny excluded middle, because it is committed to transcendent truth or objects [Shapiro]

5. Theory of Logic / H. Proof Systems / 5. Tableau Proof

7790	If an argument is invalid, a truth tree will indicate a counter-example [Girle]