14 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] |
6027 | From the fact that some men die, we cannot infer that they all do [Philodemus] |
23111 | If we say that freedom depends on rationality, the irrational actions are not free [Sidgwick] |
18762 | A maxim claims that if we are allowed to assert a sentence, that means it must be true [McGee] |
23059 | Self-interest is not rational, if the self is just a succession of memories and behaviour [Sidgwick, by Gray] |
22241 | Don't fear god or worry about death; the good is easily got and the terrible easily cured [Philodemus] |
4129 | It is self-evident (from the point of view of the Universe) that no individual has more importance than another [Sidgwick] |
20588 | Sidwick argues for utilitarian institutions, rather than actions [Sidgwick, by Tuckness/Wolf] |