5 ideas
7791 | The simplest of the logics based on possible worlds is Lewis's S5 [Lewis,CI, by Girle] |
9558 | All scientific tests will verify mathematics, so it is a background, not something being tested [Sober] |
11002 | Equating necessity with informal provability is the S4 conception of necessity [Lewis,CI, by Read] |
1748 | Archelaus was the first person to say that the universe is boundless [Archelaus, by Diog. Laertius] |
5989 | Archelaus said life began in a primeval slime [Archelaus, by Schofield] |