3 ideas
21342 | A relation is internal if two things possessing the relation could not fail to be related [Moore,GE, by Heil] |
15456 | Extrinsic properties, unlike intrinsics, imply the existence of a separate object [Kim, by Lewis] |
9425 | Lewis later proposed the axioms at the intersection of the best theories (which may be few) [Mumford on Lewis] |