4 ideas
9390 | Logic guides thinking, but it isn't a substitute for it [Rumfitt] |
18203 | Avoid non-predicative classifications and definitions [Poincaré] |
9389 | Vague membership of sets is possible if the set is defined by its concept, not its members [Rumfitt] |
16640 | Form is the principle that connects a thing's constitution (rather than being operative) [Hill,N] |