8 ideas
8758 | We could talk of open sentences, instead of sets [Chihara, by Shapiro] |
18253 | I wish to go straight from cardinals to reals (as ratios), leaving out the rationals [Frege] |
18166 | The loss of my Rule V seems to make foundations for arithmetic impossible [Frege] |
10265 | Chihara's system is a variant of type theory, from which he can translate sentences [Chihara, by Shapiro] |
8759 | We can replace type theory with open sentences and a constructibility quantifier [Chihara, by Shapiro] |
10264 | Introduce a constructibility quantifiers (Cx)Φ - 'it is possible to construct an x such that Φ' [Chihara, by Shapiro] |
18269 | Logical objects are extensions of concepts, or ranges of values of functions [Frege] |
13128 | 'Ultimate sortals' cannot explain ontological categories [Westerhoff on Wiggins] |