7 ideas
7791 | The simplest of the logics based on possible worlds is Lewis's S5 [Lewis,CI, by Girle] |
23647 | Objects have an essential constitution, producing its qualities, which we are too ignorant to define [Reid] |
11002 | Equating necessity with informal provability is the S4 conception of necessity [Lewis,CI, by Read] |
11958 | Impossibilites are easily conceived in mathematics and geometry [Reid, by Molnar] |
3102 | Why don't we experience or remember going to sleep at night? [Magee] |
23646 | Reference is by name, or a term-plus-circumstance, or ostensively, or by description [Reid] |
23645 | A word's meaning is the thing conceived, as fixed by linguistic experts [Reid] |