23 ideas
1597 | Thales was the first western thinker to believe the arché was intelligible [Roochnik on Thales] |
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] |
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] |
3013 | Nothing is stronger than necessity, which rules everything [Thales, by Diog. Laertius] |
18960 | Most predictions are uninteresting, and are only sought in order to confirm a theory [Putnam] |
1494 | Thales said water is the first principle, perhaps from observing that food is moist [Thales, by Aristotle] |
1713 | Thales must have thought soul causes movement, since he thought magnets have soul [Thales, by Aristotle] |
1742 | Thales said the gods know our wrong thoughts as well as our evil actions [Thales, by Diog. Laertius] |