4 ideas
7791 | The simplest of the logics based on possible worlds is Lewis's S5 [Lewis,CI, by Girle] |
21628 | To say reality itself is vague is not properly intelligible [Dummett] |
11002 | Equating necessity with informal provability is the S4 conception of necessity [Lewis,CI, by Read] |
20041 | Intentional actions are those which are explained by giving the reason for so acting [Anscombe] |