4 ideas
9783 | While no two classes coincide in membership, there are distinct but coextensive attributes [Cartwright,R] |
14286 | In nearby worlds where A is true, 'if A,B' is true or false if B is true or false [Stalnaker] |
14285 | A possible world is the ontological analogue of hypothetical beliefs [Stalnaker] |
15432 | Structural universals might serve as possible worlds [Forrest, by Lewis] |