4 ideas
7791 | The simplest of the logics based on possible worlds is Lewis's S5 [Lewis,CI, by Girle] |
16650 | 'Unity' is a particularly difficult word, because things can have hidden unity [Duns Scotus] |
11002 | Equating necessity with informal provability is the S4 conception of necessity [Lewis,CI, by Read] |
7825 | The politics of Leibniz was the reunification of Christianity [Stewart,M] |