31 ideas
16477 | Asserting not-p is saying p is false [Russell] |
16484 | There are four experiences that lead us to talk of 'some' things [Russell] |
9406 | A class is natural when everybody can spot further members of it [Quinton] |
16486 | The physical world doesn't need logic, but the mental world does [Russell] |
2947 | Questions wouldn't lead anywhere without the law of excluded middle [Russell] |
16480 | A disjunction expresses indecision [Russell] |
16479 | 'Or' expresses hesitation, in a dog at a crossroads, or birds risking grabbing crumbs [Russell] |
16481 | 'Or' expresses a mental state, not something about the world [Russell] |
16487 | Maybe the 'or' used to describe mental states is not the 'or' of logic [Russell] |
16483 | Disjunction may also arise in practice if there is imperfect memory. [Russell] |
16475 | A 'heterological' predicate can't be predicated of itself; so is 'heterological' heterological? Yes=no! [Russell] |
22180 | Multiple realisability is said to make reduction impossible [Okasha] |
15730 | Extreme nominalists say all classification is arbitrary convention [Quinton] |
15728 | The naturalness of a class depends as much on the observers as on the objects [Quinton] |
9407 | Properties imply natural classes which can be picked out by everybody [Quinton] |
15729 | Uninstantiated properties must be defined using the instantiated ones [Quinton] |
8520 | An individual is a union of a group of qualities and a position [Quinton, by Campbell,K] |
16482 | All our knowledge (if verbal) is general, because all sentences contain general words [Russell] |
4758 | Naïve realism leads to physics, but physics then shows that naïve realism is false [Russell] |
16476 | For simple words, a single experience can show that they are true [Russell] |
16485 | Perception can't prove universal generalisations, so abandon them, or abandon empiricism? [Russell] |
22177 | Randomised Control Trials have a treatment and a control group, chosen at random [Okasha] |
22172 | Not all sciences are experimental; astronomy relies on careful observation [Okasha] |
22174 | The discoverers of Neptune didn't change their theory because of an anomaly [Okasha] |
22175 | Science mostly aims at confirming theories, rather than falsifying them [Okasha] |
22182 | Theories with unobservables are underdetermined by the evidence [Okasha] |
22185 | Two things can't be incompatible if they are incommensurable [Okasha] |
22176 | Induction is inferences from examined to unexamined instances of a given kind [Okasha] |
22178 | If the rules only concern changes of belief, and not the starting point, absurd views can look ratiional [Okasha] |
16478 | A mother cat is paralysed if equidistant between two needy kittens [Russell] |
22173 | Galileo refuted the Aristotelian theory that heavier objects fall faster [Okasha] |