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3 ideas
7789 | Necessary implication is called 'strict implication'; if successful, it is called 'entailment' [Girle] |
4730 | For Aristotle, the subject-predicate structure of Greek reflected a substance-accident structure of reality [Aristotle, by O'Grady] |
7790 | If an argument is invalid, a truth tree will indicate a counter-example [Girle] |