4 ideas
17813 | Löwenheim-Skolem says any theory with a true interpretation has a model in the natural numbers [White,NP] |
17812 | Finite cardinalities don't need numbers as objects; numerical quantifiers will do [White,NP] |
14248 | We could accept the integers as primitive, then use sets to construct the rest [Cohen] |
5692 | Introspection is not perception, because there are no extra qualities apart from the mental events themselves [Rosenthal] |