12 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] |
| 1556 | By nature people are close to one another, but culture drives them apart [Hippias] |
| 7444 | Type-type psychophysical identity is combined with a functional characterisation of pain [Lewis] |
| 7445 | The application of 'pain' to physical states is non-rigid and contingent [Lewis] |
| 7443 | A theory must be mixed, to cover qualia without behaviour, and behaviour without qualia [Lewis, by PG] |
| 18762 | A maxim claims that if we are allowed to assert a sentence, that means it must be true [McGee] |