3 ideas
9463 | Classical logic is bivalent, has excluded middle, and only quantifies over existent objects [Jacquette] |
9425 | Lewis later proposed the axioms at the intersection of the best theories (which may be few) [Mumford on Lewis] |
16745 | No one even knows the nature and properties of a fly - why it has that colour, or so many feet [Bacon,R] |