21 ideas
| 18951 | For scientific purposes there is a precise concept of 'true-in-L', using set theory [Putnam] |
| 18953 | Modern notation frees us from Aristotle's restriction of only using two class-names in premises [Putnam] |
| 18949 | The universal syllogism is now expressed as the transitivity of subclasses [Putnam] |
| 18952 | '⊃' ('if...then') is used with the definition 'Px ⊃ Qx' is short for '¬(Px & ¬Qx)' [Putnam] |
| 18958 | In type theory, 'x ∈ y' is well defined only if x and y are of the appropriate type [Putnam] |
| 18954 | Before the late 19th century logic was trivialised by not dealing with relations [Putnam] |
| 18956 | Asserting first-order validity implicitly involves second-order reference to classes [Putnam] |
| 18962 | Unfashionably, I think logic has an empirical foundation [Putnam] |
| 18961 | We can identify functions with certain sets - or identify sets with certain functions [Putnam] |
| 18955 | Having a valid form doesn't ensure truth, as it may be meaningless [Putnam] |
| 18959 | Sets larger than the continuum should be studied in an 'if-then' spirit [Putnam] |
| 8386 | Events are picked out by descriptions, and facts by whole sentences [Crane] |
| 18430 | We accept properties because of type/tokens, reference, and quantification [Edwards] |
| 18432 | Quineans say that predication is primitive and inexplicable [Edwards] |
| 18957 | Nominalism only makes sense if it is materialist [Putnam] |
| 18437 | Resemblance nominalism requires a second entity to explain 'the rose is crimson' [Edwards] |
| 18950 | Physics is full of non-physical entities, such as space-vectors [Putnam] |
| 18434 | That a whole is prior to its parts ('priority monism') is a view gaining in support [Edwards] |
| 18960 | Most predictions are uninteresting, and are only sought in order to confirm a theory [Putnam] |
| 8387 | A cause has its effects in virtue of its properties [Crane] |
| 8384 | The regularity theory explains a causal event by other items than the two that are involved [Crane] |