27 ideas
| 14519 | It is a great good to show reverence for a wise man [Epicurus] |
| 291 | Don't assume that wisdom is the automatic consequence of old age [Plato] |
| 14518 | In the study of philosophy, pleasure and knowledge arrive simultaneously [Epicurus] |
| 8472 | Sentential logic is consistent (no contradictions) and complete (entirely provable) [Orenstein] |
| 8476 | Axiomatization simply picks from among the true sentences a few to play a special role [Orenstein] |
| 8480 | S4: 'poss that poss that p' implies 'poss that p'; S5: 'poss that nec that p' implies 'nec that p' [Orenstein] |
| 8474 | Unlike elementary logic, set theory is not complete [Orenstein] |
| 8465 | Mereology has been exploited by some nominalists to achieve the effects of set theory [Orenstein] |
| 8452 | Traditionally, universal sentences had existential import, but were later treated as conditional claims [Orenstein] |
| 8475 | The substitution view of quantification says a sentence is true when there is a substitution instance [Orenstein] |
| 8454 | The whole numbers are 'natural'; 'rational' numbers include fractions; the 'reals' include root-2 etc. [Orenstein] |
| 8473 | The logicists held that is-a-member-of is a logical constant, making set theory part of logic [Orenstein] |
| 8458 | Just individuals in Nominalism; add sets for Extensionalism; add properties, concepts etc for Intensionalism [Orenstein] |
| 14524 | Bodies are combinations of shape, size, resistance and weight [Epicurus] |
| 8457 | The Principle of Conservatism says we should violate the minimum number of background beliefs [Orenstein] |
| 14521 | If everything is by necessity, then even denials of necessity are by necessity [Epicurus] |
| 8477 | People presume meanings exist because they confuse meaning and reference [Orenstein] |
| 8471 | Three ways for 'Socrates is human' to be true are nominalist, platonist, or Montague's way [Orenstein] |
| 8484 | If two people believe the same proposition, this implies the existence of propositions [Orenstein] |
| 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] |
| 293 | Being unafraid (perhaps through ignorance) and being brave are two different things [Plato] |
| 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] |