9 ideas
14626 | In S5 matters of possibility and necessity are non-contingent [Williamson] |
15034 | Are genera and species real or conceptual? bodies or incorporeal? in sensibles or separate from them? [Porphyry] |
14625 | Necessity is counterfactually implied by its negation; possibility does not counterfactually imply its negation [Williamson] |
9212 | Possible states of affairs are not propositions; a proposition can't be a state of affairs! [Fine,K] |
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] |
9213 | The actual world is a possible world, so we can't define possible worlds as 'what might have been' [Fine,K] |
14628 | Imagination is important, in evaluating possibility and necessity, via counterfactuals [Williamson] |