9 ideas
9456 | Modal logic is multiple systems, shown in the variety of accessibility relations between worlds [Jacquette] |
9457 | The two main views in philosophy of logic are extensionalism and intensionalism [Jacquette] |
9390 | Logic guides thinking, but it isn't a substitute for it [Rumfitt] |
9458 | Extensionalists say that quantifiers presuppose the existence of their objects [Jacquette] |
9461 | Intensionalists say meaning is determined by the possession of properties [Jacquette] |
9389 | Vague membership of sets is possible if the set is defined by its concept, not its members [Rumfitt] |
9459 | Extensionalist semantics is circular, as we must know the extension before assessing 'Fa' [Jacquette] |
9460 | Extensionalist semantics forbids reference to nonexistent objects [Jacquette] |
4316 | Either all action is rational, or reason dominates, or reason is only concerned with means [Cottingham] |