23 ideas
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] |
15959 | If the substantial form of brass implies its stability, how can it melt and remain brass? [Alexander,P] |
15956 | The peripatetics treated forms and real qualities as independent of matter, and non-material [Alexander,P] |
8457 | The Principle of Conservatism says we should violate the minimum number of background beliefs [Orenstein] |
15975 | Can the qualities of a body be split into two groups, where the smaller explains the larger? [Alexander,P] |
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] |
4053 | If it is desirable that a given patient die, then moral objections to killing them do not apply [Rachels] |
4052 | It has become normal to consider passive euthanasia while condemning active euthanasia [Rachels] |
15963 | Science has been partly motivated by the belief that the universe is run by God's laws [Alexander,P] |
15951 | Alchemists tried to separate out essences, which influenced later chemistry [Alexander,P] |
15981 | Absolute space either provides locations, or exists but lacks 'marks' for locations [Alexander,P] |
20713 | God must be fit for worship, but worship abandons morally autonomy, but there is no God [Rachels, by Davies,B] |