5 ideas
18801 | Classical negation is circular, if it relies on knowing negation-conditions from truth-conditions [Dummett] |
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] |
19399 | Prime matter is nothing when it is at rest [Leibniz] |
9419 | A law of nature is a general axiom of the deductive system that is best for simplicity and strength [Lewis] |