20 ideas
| 14519 | It is a great good to show reverence for a wise man [Epicurus] |
| 14518 | In the study of philosophy, pleasure and knowledge arrive simultaneously [Epicurus] |
| 13338 | '"It is snowing" is true if and only if it is snowing' is a partial definition of the concept of truth [Tarski] |
| 13337 | A language: primitive terms, then definition rules, then sentences, then axioms, and finally inference rules [Tarski] |
| 13335 | Semantics is the concepts of connections of language to reality, such as denotation, definition and truth [Tarski] |
| 13336 | A language containing its own semantics is inconsistent - but we can use a second language [Tarski] |
| 13339 | A sentence is satisfied when we can assert the sentence when the variables are assigned [Tarski] |
| 13340 | Satisfaction is the easiest semantical concept to define, and the others will reduce to it [Tarski] |
| 13341 | Using the definition of truth, we can prove theories consistent within sound logics [Tarski] |
| 14524 | Bodies are combinations of shape, size, resistance and weight [Epicurus] |
| 14521 | If everything is by necessity, then even denials of necessity are by necessity [Epicurus] |
| 14522 | What happens to me if I obtain all my desires, and what if I fail? [Epicurus] |
| 3563 | Pleasure and virtue entail one another [Epicurus] |
| 3560 | Justice is merely a contract about not harming or being harmed [Epicurus] |
| 14517 | We value our own character, whatever it is, and we should respect the characters of others [Epicurus] |
| 14513 | Justice is a pledge of mutual protection [Epicurus] |
| 14515 | A law is not just if it is not useful in mutual associations [Epicurus] |
| 14520 | It is small-minded to find many good reasons for suicide [Epicurus] |
| 1748 | Archelaus was the first person to say that the universe is boundless [Archelaus, by Diog. Laertius] |
| 5989 | Archelaus said life began in a primeval slime [Archelaus, by Schofield] |