6 ideas
16541 | All the intrinsic properties of a thing should be deducible from its definition [Spinoza] |
13342 | Carnap defined consequence by contradiction, but this is unintuitive and changes with substitution [Tarski on Carnap] |
13251 | Each person is free to build their own logic, just by specifying a syntax [Carnap] |
13073 | To understand the properties we must know the essence, as with a circle [Spinoza] |
16713 | Philosophers are the forefathers of heretics [Tertullian] |
6610 | I believe because it is absurd [Tertullian] |