5 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] |
579 | Cratylus said you couldn't even step into the same river once [Cratylus, by Aristotle] |
6445 | You have knowledge if you can rule out all the relevant alternatives to what you believe [Dretske, by DeRose] |
578 | Cratylus decided speech was hopeless, and his only expression was the movement of a finger [Cratylus, by Aristotle] |