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] |
16083 | Aristotelian matter seriously threatens the intrinsic unity and substantiality of its object [Gill,ML] |
14975 | A de dicto necessity is true in all worlds, but not necessarily of the same thing in each world [Cresswell] |
17006 | Prime matter has no place in Aristotle's theories, and passages claiming it are misread [Gill,ML] |
16093 | Prime matter is actually nothing and potentially everything (or potentially an element) [Gill,ML] |
1513 | The Egyptians were the first to say the soul is immortal and reincarnated [Herodotus] |