9 ideas
18812 | Split out the logical vocabulary, make an assignment to the rest. It's logical if premises and conclusion match [Tarski, by Rumfitt] |
13344 | X follows from sentences K iff every model of K also models X [Tarski] |
13343 | A 'model' is a sequence of objects which satisfies a complete set of sentential functions [Tarski] |
579 | Cratylus said you couldn't even step into the same river once [Cratylus, by Aristotle] |
578 | Cratylus decided speech was hopeless, and his only expression was the movement of a finger [Cratylus, by Aristotle] |
13345 | Sentences are 'analytical' if every sequence of objects models them [Tarski] |
23035 | The good life aims at perfections, or absolute laws, or what is absolutely desirable [Green,TH] |
23037 | People are improved by egalitarian institutions and habits [Green,TH] |
23043 | All talk of the progress of a nation must reduce to the progress of its individual members [Green,TH] |