13 ideas
| 10365 | We might use 'facta' to refer to the truth-makers for facts [Mellor, by Schaffer,J] |
| 14970 | Normal system K has five axioms and rules [Cresswell] |
| 14971 | D is valid on every serial frame, but not where there are dead ends [Cresswell] |
| 14972 | S4 has 14 modalities, and always reduces to a maximum of three modal operators [Cresswell] |
| 14973 | In S5 all the long complex modalities reduce to just three, and their negations [Cresswell] |
| 14976 | Reject the Barcan if quantifiers are confined to worlds, and different things exist in other worlds [Cresswell] |
| 14974 | A relation is 'Euclidean' if aRb and aRc imply bRc [Cresswell] |
| 14975 | A de dicto necessity is true in all worlds, but not necessarily of the same thing in each world [Cresswell] |
| 14361 | Lewis says indicative conditionals are truth-functional [Lewis, by Jackson] |
| 8434 | In good counterfactuals the consequent holds in world like ours except that the antecedent is true [Lewis, by Horwich] |
| 4785 | Causal statements relate facts (which are whatever true propositions express) [Mellor, by Psillos] |
| 8408 | Probabilistic causation says C is a cause of E if it increases the chances of E occurring [Mellor, by Tooley] |
| 9419 | A law of nature is a general axiom of the deductive system that is best for simplicity and strength [Lewis] |