4 ideas
7791 | The simplest of the logics based on possible worlds is Lewis's S5 [Lewis,CI, by Girle] |
21547 | On Meinong's principles 'the existent round square' has to exist [Russell] |
11002 | Equating necessity with informal provability is the S4 conception of necessity [Lewis,CI, by Read] |
5996 | Critolaus redefined Aristotle's moral aim as fulfilment instead of happiness [Critolaus, by White,SA] |