8 ideas
6408 | Russell needed three extra axioms to reduce maths to logic: infinity, choice and reducibility [Grayling] |
16045 | General facts supervene on particular facts, but cannot be inferred from them [Russell, by Bennett,K] |
14327 | Trope theorists cannot explain how tropes resemble each other [Russell, by Mumford] |
13768 | Validity can preserve certainty in mathematics, but conditionals about contingents are another matter [Edgington] |
13770 | There are many different conditional mental states, and different conditional speech acts [Edgington] |
13764 | Are conditionals truth-functional - do the truth values of A and B determine the truth value of 'If A, B'? [Edgington] |
13765 | 'If A,B' must entail ¬(A & ¬B); otherwise we could have A true, B false, and If A,B true, invalidating modus ponens [Edgington] |
6414 | Two propositions might seem self-evident, but contradict one another [Grayling] |