4 ideas
21373 | We become objective when we detach ourselves from the world [Janaway] |
6564 | To affirm 'p and not-p' is to have mislearned 'and' or 'not' [Quine] |
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] |