11 ideas
| 14970 | Normal system K has five axioms and rules [Cresswell] |
| 14971 | D is valid on every serial frame, but not where there are dead ends [Cresswell] |
| 14972 | S4 has 14 modalities, and always reduces to a maximum of three modal operators [Cresswell] |
| 14973 | In S5 all the long complex modalities reduce to just three, and their negations [Cresswell] |
| 14976 | Reject the Barcan if quantifiers are confined to worlds, and different things exist in other worlds [Cresswell] |
| 14974 | A relation is 'Euclidean' if aRb and aRc imply bRc [Cresswell] |
| 14975 | A de dicto necessity is true in all worlds, but not necessarily of the same thing in each world [Cresswell] |
| 21799 | We just use the word 'faculty' when we don't know the psychological cause [Galen] |
| 8872 | It is widely supposed that externalism cannot be reconciled with first-person authority [Davidson] |
| 8874 | It is hard to interpret a speaker's actions if we take a broad view of the content [Davidson] |
| 8873 | The cause of a usage determines meaning, but why is the microstructure of water relevant? [Davidson] |