20 ideas
4037 | Ockham's Razor is the principle that we need reasons to believe in entities [Mellor/Oliver] |
18806 | Frege thought traditional categories had psychological and linguistic impurities [Frege, by Rumfitt] |
8490 | First-level functions have objects as arguments; second-level functions take functions as arguments [Frege] |
8492 | Relations are functions with two arguments [Frege] |
8487 | Arithmetic is a development of logic, so arithmetical symbolism must expand into logical symbolism [Frege] |
18899 | Frege takes the existence of horses to be part of their concept [Frege, by Sommers] |
4027 | Properties are respects in which particular objects may be alike or differ [Mellor/Oliver] |
4028 | Frege allows either too few properties (as extensions) or too many (as predicates) [Mellor/Oliver on Frege] |
4029 | Nominalists ask why we should postulate properties at all [Mellor/Oliver] |
8489 | The concept 'object' is too simple for analysis; unlike a function, it is an expression with no empty place [Frege] |
9947 | Concepts are the ontological counterparts of predicative expressions [Frege, by George/Velleman] |
10319 | An assertion about the concept 'horse' must indirectly speak of an object [Frege, by Hale] |
8488 | A concept is a function whose value is always a truth-value [Frege] |
9948 | Unlike objects, concepts are inherently incomplete [Frege, by George/Velleman] |
4039 | Abstractions lack causes, effects and spatio-temporal locations [Mellor/Oliver] |
4972 | I may regard a thought about Phosphorus as true, and the same thought about Hesperus as false [Frege] |
4692 | It is not true that killing and allowing to die (or acts and omissions) are morally indistinguishable [Foot] |
4694 | Making a runaway tram kill one person instead of five is diverting a fatal sequence, not initiating one [Foot] |
4693 | The right of non-interference (with a 'negative duty'), and the right to goods/services ('positive') [Foot] |
8491 | The Ontological Argument fallaciously treats existence as a first-level concept [Frege] |