4 ideas
21373 | We become objective when we detach ourselves from the world [Janaway] |
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] |
14963 | Surely the past phases of a thing are not parts of the thing? [Broad] |