4 ideas
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] |
1556 | By nature people are close to one another, but culture drives them apart [Hippias] |
19413 | If we know what is good or rational, our knowledge is extended, and our free will restricted [Leibniz] |