11 ideas
| 7085 | The main problem of philosophy is what can and cannot be thought and expressed [Wittgenstein, by Grayling] |
| 14187 | If logic is topic-neutral that means it delves into all subjects, rather than having a pure subject matter [Read] |
| 14188 | Not all arguments are valid because of form; validity is just true premises and false conclusion being impossible [Read] |
| 14182 | If the logic of 'taller of' rests just on meaning, then logic may be the study of merely formal consequence [Read] |
| 14183 | Maybe arguments are only valid when suppressed premises are all stated - but why? [Read] |
| 14184 | In modus ponens the 'if-then' premise contributes nothing if the conclusion follows anyway [Read] |
| 14186 | Logical connectives contain no information, but just record combination relations between facts [Read] |
| 23463 | Atomic facts correspond to true elementary propositions [Wittgenstein] |
| 14185 | Conditionals are just a shorthand for some proof, leaving out the details [Read] |
| 23490 | A thought is mental constituents that relate to reality as words do [Wittgenstein] |
| 1863 | If the soul achieves well-being in another life, it doesn't follow that I do [Aquinas] |