4 ideas
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] |
9916 | Convention, yes! Arbitrary, no! [Poincaré, by Putnam] |
18269 | Logical objects are extensions of concepts, or ranges of values of functions [Frege] |