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Ideas for
'fragments/reports', 'Axiomatic Theories of Truth (2005 ver)' and 'The Metaphysics of Modality'
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5 ideas
5. Theory of Logic / B. Logical Consequence / 5. Modus Ponens
8078
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Modus ponens is one of five inference rules identified by the Stoics [Chrysippus, by Devlin]
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5. Theory of Logic / C. Ontology of Logic / 1. Ontology of Logic
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We can use truth instead of ontologically loaded second-order comprehension assumptions about properties [Halbach]
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5. Theory of Logic / D. Assumptions for Logic / 2. Excluded Middle
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Every proposition is either true or false [Chrysippus, by Cicero]
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5. Theory of Logic / E. Structures of Logic / 2. Logical Connectives / d. and
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Is the meaning of 'and' given by its truth table, or by its introduction and elimination rules? [Forbes,G]
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5. Theory of Logic / E. Structures of Logic / 7. Predicates in Logic
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Instead of saying x has a property, we can say a formula is true of x - as long as we have 'true' [Halbach]
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