9 ideas
14626 | In S5 matters of possibility and necessity are non-contingent [Williamson] |
10242 | I apply structuralism to concrete and abstract objects indiscriminately [Quine] |
15540 | You can't deny temporary intrinsic properties by saying the properties are relations (to times) [Lewis] |
10243 | My ontology is quarks etc., classes of such things, classes of such classes etc. [Quine] |
14625 | Necessity is counterfactually implied by its negation; possibility does not counterfactually imply its negation [Williamson] |
14623 | Strict conditionals imply counterfactual conditionals: □(A⊃B)⊃(A□→B) [Williamson] |
14624 | Counterfactual conditionals transmit possibility: (A□→B)⊃(◊A⊃◊B) [Williamson] |
14531 | Rather than define counterfactuals using necessity, maybe necessity is a special case of counterfactuals [Williamson, by Hale/Hoffmann,A] |
14628 | Imagination is important, in evaluating possibility and necessity, via counterfactuals [Williamson] |