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Ideas for 'fragments/reports', 'Philosophical Insignificance of A Priori Knowledge' and 'Senses of Essence'

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5 ideas

5. Theory of Logic / B. Logical Consequence / 5. Modus Ponens

8078	Modus ponens is one of five inference rules identified by the Stoics [Chrysippus, by Devlin]

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

6023	Every proposition is either true or false [Chrysippus, by Cicero]

5. Theory of Logic / E. Structures of Logic / 2. Logical Connectives / a. Logical connectives

11175

Logical concepts rest on certain inferences, not on facts about implications [Fine,K]

5. Theory of Logic / F. Referring in Logic / 3. Property (λ-) Abstraction

11176

The property of Property Abstraction says any suitable condition must imply a property [Fine,K]

5. Theory of Logic / I. Semantics of Logic / 3. Logical Truth

11174

A logical truth is true in virtue of the nature of the logical concepts [Fine,K]