8 ideas
7791 | The simplest of the logics based on possible worlds is Lewis's S5 [Lewis,CI, by Girle] |
23026 | We know mathematical axioms, such as subtracting equals from equals leaves equals, by a natural light [Leibniz] |
13189 | A necessary feature (such as air for humans) is not therefore part of the essence [Leibniz] |
11002 | Equating necessity with informal provability is the S4 conception of necessity [Lewis,CI, by Read] |
19432 | Intelligible truth is independent of any external things or experiences [Leibniz] |
19430 | We know objects by perceptions, but their qualities don't reveal what it is we are perceiving [Leibniz] |
7628 | Broad rejects the inferential component of the representative theory [Broad, by Maund] |
19431 | There is nothing in the understanding but experiences, plus the understanding itself, and the understander [Leibniz] |