15 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] |
| 14759 | A thing is simply a long event, linked by qualities, and spatio-temporal unity [Broad] |
| 14963 | Surely the past phases of a thing are not parts of the thing? [Broad] |
| 11842 | If short-lived happenings like car crashes are 'events', why not long-lived events like Dover Cliffs? [Broad] |
| 14975 | A de dicto necessity is true in all worlds, but not necessarily of the same thing in each world [Cresswell] |
| 7628 | Broad rejects the inferential component of the representative theory [Broad, by Maund] |
| 8160 | The present and past exist, but the future does not [Broad, by Dummett] |
| 14609 | We could say present and past exist, but not future, so that each event adds to the total history [Broad] |
| 22933 | We imagine the present as a spotlight, moving across events from past to future [Broad] |
| 1513 | The Egyptians were the first to say the soul is immortal and reincarnated [Herodotus] |