11 ideas
20435 | If philosophy could be summarised it would be pointless [Adorno] |
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] |
7777 | We accept a metaphor when we see the sentence is false [Davidson] |
7776 | Metaphors just mean what their words literally mean [Davidson] |
7775 | Understanding a metaphor is a creative act, with no rules [Davidson] |