6 ideas
7791 | The simplest of the logics based on possible worlds is Lewis's S5 [Lewis,CI, by Girle] |
11002 | Equating necessity with informal provability is the S4 conception of necessity [Lewis,CI, by Read] |
16634 | I can't be unaware of anything which is in me [Descartes] |
7903 | The six perfections are giving, morality, patience, vigour, meditation, and wisdom [Nagarjuna] |
3635 | Essence must be known before we discuss existence [Descartes] |
3634 | We can't prove a first cause from our inability to grasp infinity [Descartes] |