13 ideas
18755 | Validity is explained as truth in all models, because that relies on the logical terms [McGee] |
18751 | Natural language includes connectives like 'because' which are not truth-functional [McGee] |
18761 | Second-order variables need to range over more than collections of first-order objects [McGee] |
18753 | An ontologically secure semantics for predicate calculus relies on sets [McGee] |
18754 | Logically valid sentences are analytic truths which are just true because of their logical words [McGee] |
18757 | Soundness theorems are uninformative, because they rely on soundness in their proofs [McGee] |
18760 | The culmination of Euclidean geometry was axioms that made all models isomorphic [McGee] |
22363 | You have only begun to do real science when you can express it in numbers [Kelvin] |
18762 | A maxim claims that if we are allowed to assert a sentence, that means it must be true [McGee] |
7777 | We accept a metaphor when we see the sentence is false [Davidson] |
7775 | Understanding a metaphor is a creative act, with no rules [Davidson] |
7776 | Metaphors just mean what their words literally mean [Davidson] |
20644 | Energy has progressed from a mere formula, to a principle pervading all nature [Kelvin] |