181 ideas
2319 | Metaphysics is the clarification of the ontological relationships between different areas of thought [Kim] |
3426 | If one theory is reduced to another, we make fewer independent assumptions about the world [Kim] |
10987 | Three traditional names of rules are 'Simplification', 'Addition' and 'Disjunctive Syllogism' [Read] |
11004 | Necessity is provability in S4, and true in all worlds in S5 [Read] |
11018 | There are fuzzy predicates (and sets), and fuzzy quantifiers and modifiers [Read] |
11011 | Same say there are positive, negative and neuter free logics [Read] |
11020 | Realisms like the full Comprehension Principle, that all good concepts determine sets [Read] |
14187 | If logic is topic-neutral that means it delves into all subjects, rather than having a pure subject matter [Read] |
10986 | Not all validity is captured in first-order logic [Read] |
10972 | The non-emptiness of the domain is characteristic of classical logic [Read] |
11024 | Semantics must precede proof in higher-order logics, since they are incomplete [Read] |
10985 | We should exclude second-order logic, precisely because it captures arithmetic [Read] |
14188 | Not all arguments are valid because of form; validity is just true premises and false conclusion being impossible [Read] |
14182 | If the logic of 'taller of' rests just on meaning, then logic may be the study of merely formal consequence [Read] |
14183 | Maybe arguments are only valid when suppressed premises are all stated - but why? [Read] |
10970 | A theory of logical consequence is a conceptual analysis, and a set of validity techniques [Read] |
10984 | Logical consequence isn't just a matter of form; it depends on connections like round-square [Read] |
14184 | In modus ponens the 'if-then' premise contributes nothing if the conclusion follows anyway [Read] |
14186 | Logical connectives contain no information, but just record combination relations between facts [Read] |
10973 | A theory is logically closed, which means infinite premisses [Read] |
11007 | Quantifiers are second-order predicates [Read] |
10978 | In second-order logic the higher-order variables range over all the properties of the objects [Read] |
10971 | A logical truth is the conclusion of a valid inference with no premisses [Read] |
10988 | Any first-order theory of sets is inadequate [Read] |
10975 | Compactness does not deny that an inference can have infinitely many premisses [Read] |
10974 | Compactness is when any consequence of infinite propositions is the consequence of a finite subset [Read] |
10977 | Compactness blocks the proof of 'for every n, A(n)' (as the proof would be infinite) [Read] |
10976 | Compactness makes consequence manageable, but restricts expressive power [Read] |
11014 | Self-reference paradoxes seem to arise only when falsity is involved [Read] |
11025 | Infinite cuts and successors seems to suggest an actual infinity there waiting for us [Read] |
10979 | Although second-order arithmetic is incomplete, it can fully model normal arithmetic [Read] |
10980 | Second-order arithmetic covers all properties, ensuring categoricity [Read] |
10997 | Von Neumann numbers are helpful, but don't correctly describe numbers [Read] |
4779 | For Kim, events are exemplifications of properties by objects at particular times [Kim, by Psillos] |
10369 | How fine-grained Kim's events are depends on how finely properties are individuated [Kim, by Schaffer,J] |
8974 | Events are composed of an object with an attribute at a time [Kim, by Simons] |
8975 | Events cannot be merely ordered triples, but must specify the link between the elements [Kim, by Simons] |
8976 | If events are ordered triples of items, such things seem to be sets, and hence abstract [Simons on Kim] |
8977 | Since properties like self-identity and being 2+2=4 are timeless, Kim must restrict his properties [Simons on Kim] |
8980 | Kim's theory results in too many events [Simons on Kim] |
2317 | Reductionism is good on light, genes, temperature and transparency [Kim, by PG] |
3536 | Supervenient properties must have matching base properties [Kim] |
2310 | Supervenience is linked to dependence [Kim] |
2315 | Mereological supervenience says wholes are fixed by parts [Kim] |
13745 | Supervenience is not a dependence relation, on the lines of causal, mereological or semantic dependence [Kim] |
13746 | Supervenience is just a 'surface' relation of pattern covariation, which still needs deeper explanation [Kim] |
3431 | Supervenience suggest dependence without reduction (e.g. beauty) [Kim] |
2329 | Causal power is a good way of distinguishing the real from the unreal [Kim] |
3437 | 'Physical facts determine all the facts' is the physicalists' slogan [Kim] |
11016 | Would a language without vagueness be usable at all? [Read] |
11019 | Supervaluations say there is a cut-off somewhere, but at no particular place [Read] |
11012 | A 'supervaluation' gives a proposition consistent truth-value for classical assignments [Read] |
11013 | Identities and the Indiscernibility of Identicals don't work with supervaluations [Read] |
16661 | There are two sorts of category - referring to things, and to circumstances of things [Boethius] |
15456 | Extrinsic properties, unlike intrinsics, imply the existence of a separate object [Kim, by Lewis] |
3430 | Resemblance or similarity is the core of our concept of a property [Kim] |
3432 | Is weight a 'resultant' property of water, but transparency an 'emergent' property? [Kim] |
3434 | Emergent properties are 'brute facts' (inexplicable), but still cause things [Kim] |
2320 | Properties can have causal powers lacked by their constituents [Kim] |
3436 | Should properties be individuated by their causal powers? [Kim] |
15035 | If universals are not separate, we can isolate them by abstraction [Boethius, by Panaccio] |
14665 | We can call the quality of Plato 'Platonity', and say it is a quality which only he possesses [Boethius] |
10995 | A haecceity is a set of individual properties, essential to each thing [Read] |
11001 | Equating necessity with truth in every possible world is the S5 conception of necessity [Read] |
10989 | The standard view of conditionals is that they are truth-functional [Read] |
10992 | The point of conditionals is to show that one will accept modus ponens [Read] |
11017 | Some people even claim that conditionals do not express propositions [Read] |
14185 | Conditionals are just a shorthand for some proof, leaving out the details [Read] |
3406 | Counterfactuals are either based on laws, or on nearby possible worlds [Kim, by PG] |
10983 | Knowledge of possible worlds is not causal, but is an ontology entailed by semantics [Read] |
10982 | How can modal Platonists know the truth of a modal proposition? [Read] |
10996 | Actualism is reductionist (to parts of actuality), or moderate realist (accepting real abstractions) [Read] |
10981 | A possible world is a determination of the truth-values of all propositions of a domain [Read] |
11000 | If worlds are concrete, objects can't be present in more than one, and can only have counterparts [Read] |
23308 | Reasoning relates to understanding as time does to eternity [Boethius, by Sorabji] |
8825 | It seems impossible to logically deduce physical knowledge from indubitable sense data [Kim] |
530 | There are two contradictory arguments about everything [Kim] |
13314 | Protagoras says arguments on both sides are always equal [Kim, by Seneca] |
1550 | Why didn't Protagoras begin by saying "a tadpole is the measure of all things"? [Plato on Kim] |
2065 | Not every person is the measure of all things, but only wise people [Plato on Kim] |
14470 | Explanatory exclusion: there cannot be two separate complete explanations of a single event [Kim] |
3368 | Mind is basically qualities and intentionality, but how do they connect? [Kim] |
3392 | Mind is only interesting if it has causal powers [Kim] |
3396 | Experiment requires mental causation [Kim] |
2318 | Agency, knowledge, reason, memory, psychology all need mental causes [Kim, by PG] |
3397 | Beliefs cause other beliefs [Kim] |
3367 | Both thought and language have intentionality [Kim] |
3365 | Intentionality involves both reference and content [Kim] |
2325 | It seems impossible that an exact physical copy of this world could lack intentionality [Kim] |
3360 | Are pains pure qualia, or do they motivate? [Kim] |
3366 | Pain has no reference or content [Kim] |
3389 | Inverted qualia and zombies suggest experience isn't just functional [Kim] |
3391 | Crosswiring would show that pain and its function are separate [Kim, by PG] |
10998 | The mind abstracts ways things might be, which are nonetheless real [Read] |
3422 | Externalism about content makes introspection depend on external evidence [Kim] |
3363 | We often can't decide what emotion, or even sensation, we are experiencing [Kim] |
3412 | How do we distinguish our anger from embarrassment? [Kim] |
5771 | Knowledge of present events doesn't make them necessary, so future events are no different [Boethius] |
5767 | Rational natures require free will, in order to have power of judgement [Boethius] |
5769 | Does foreknowledge cause necessity, or necessity cause foreknowledge? [Boethius] |
5768 | God's universal foreknowledge seems opposed to free will [Boethius] |
3409 | Mental substance causation makes physics incomplete [Kim] |
3399 | If epiphenomenalism were true, we couldn't report consciousness [Kim] |
3390 | Are inverted or absent qualia coherent ideas? [Kim] |
3414 | What could demonstrate that zombies and inversion are impossible? [Kim] |
3359 | Cartesian dualism fails because it can't explain mental causation [Kim] |
3369 | Logical behaviourism translates mental language to behavioural [Kim] |
3428 | Behaviourism reduces mind to behaviour via bridging principles [Kim] |
3380 | Are dispositions real, or just a type of explanation? [Kim] |
3370 | What behaviour goes with mathematical beliefs? [Kim] |
3371 | Behaviour depends on lots of mental states together [Kim] |
3372 | Behaviour is determined by society as well as mental states [Kim] |
3373 | Snakes have different pain behaviour from us [Kim] |
3388 | Machine functionalism requires a Turing machine, causal-theoretical version doesn't [Kim] |
2324 | Intentionality as function seems possible [Kim] |
3379 | Neurons seem to be very similar and interchangeable [Kim] |
3384 | The person couldn't run Searle's Chinese Room without understanding Chinese [Kim] |
3393 | How do functional states give rise to mental causation? [Kim] |
3439 | Reductionism gets stuck with qualia [Kim] |
3427 | Reductionism is impossible if there aren't any 'bridge laws' between mental and physical [Kim] |
2314 | Maybe intentionality is reducible, but qualia aren't [Kim] |
3376 | We can't assess evidence about mind without acknowledging phenomenal properties [Kim] |
3424 | Most modern physicalists are non-reductive property dualists [Kim] |
2313 | Emergentism says there is no explanation for a supervenient property [Kim] |
2328 | The only mental property that might be emergent is that of qualia [Kim] |
3362 | Supervenience says all souls are identical, being physically indiscernible [Kim] |
3413 | Zombies and inversion suggest non-reducible supervenience [Kim] |
2309 | Non-Reductive Physicalism relies on supervenience [Kim] |
2311 | Maybe strong supervenience implies reduction [Kim] |
3374 | Token physicalism isn't reductive; it just says all mental events have some physical properties [Kim] |
3433 | The core of the puzzle is the bridge laws between mind and brain [Kim] |
3377 | Elimination can either be by translation or by causal explanation [Kim] |
3438 | Reductionists deny new causal powers at the higher level [Kim] |
3440 | Without reductionism, mental causation is baffling [Kim] |
2308 | Identity theory was overthrown by multiple realisations and causal anomalies [Kim] |
2322 | Multiple realisation applies to other species, and even one individual over time [Kim] |
2327 | Knowledge and inversion make functionalism about qualia doubtful [Kim] |
3375 | If an orange image is a brain state, are some parts of the brain orange? [Kim] |
3411 | How do we distinguish our attitudes from one another? [Kim] |
2323 | Emotions have both intentionality and qualia [Kim] |
3410 | Folk psychology has adapted to Freudianism [Kim] |
3394 | Maybe folk psychology is a simulation, not a theory [Kim] |
3387 | A culture without our folk psychology would be quite baffling [Kim] |
3386 | Folk psychology has been remarkably durable [Kim] |
3382 | A machine with a mind might still fail the Turing Test [Kim] |
3383 | The Turing Test is too specifically human in its requirements [Kim] |
3408 | Two identical brain states could have different contents in different worlds [Kim] |
3420 | Two types of water are irrelevant to accounts of behaviour [Kim] |
3418 | 'Arthritis in my thigh' requires a social context for its content to be meaningful [Kim] |
3416 | Content may match several things in the environment [Kim] |
3421 | Content is best thought of as truth conditions [Kim] |
3417 | Content depends on other content as well as the facts [Kim] |
3419 | Pain, our own existence, and negative existentials, are not external [Kim] |
11005 | Negative existentials with compositionality make the whole sentence meaningless [Read] |
10966 | A proposition objectifies what a sentence says, as indicative, with secure references [Read] |
3403 | We assume people believe the obvious logical consequences of their known beliefs [Kim] |
3402 | If someone says "I do and don't like x", we don't assume a contradiction [Kim] |
5762 | The wicked want goodness, so they would not be wicked if they obtained it [Boethius] |
5770 | Rewards and punishments are not deserved if they don't arise from free movement of the mind [Boethius] |
5764 | When people fall into wickedness they lose their human nature [Boethius] |
5756 | Happiness is a good which once obtained leaves nothing more to be desired [Boethius] |
5763 | The bad seek the good through desire, but the good through virtue, which is more natural [Boethius] |
5759 | Varied aims cannot be good because they differ, but only become good when they unify [Boethius] |
5754 | You can't control someone's free mind, only their body and possessions [Boethius] |
8430 | Causal statements are used to explain, to predict, to control, to attribute responsibility, and in theories [Kim] |
3535 | All observable causes are merely epiphenomena [Kim] |
3401 | A common view is that causal connections must be instances of a law [Kim] |
8396 | Many counterfactuals have nothing to do with causation [Kim, by Tooley] |
8429 | Counterfactuals can express four other relations between events, apart from causation [Kim] |
8428 | Causation is not the only dependency relation expressed by counterfactuals [Kim] |
3407 | Laws are either 'strict', or they involve a 'ceteris paribus' clause [Kim] |
4781 | Many counterfactual truths do not imply causation ('if yesterday wasn't Monday, it isn't Tuesday') [Kim, by Psillos] |
16692 | Divine eternity is the all-at-once and complete possession of unending life [Boethius] |
5752 | Where does evil come from if there is a god; where does good come from if there isn't? [Boethius] |
5757 | God is the supreme good, so no source of goodness could take precedence over God [Boethius] |
5758 | God is the good [Boethius] |
5760 | The power through which creation remains in existence and motion I call 'God' [Boethius] |
5753 | The regular events of this life could never be due to chance [Boethius] |
5765 | The reward of the good is to become gods [Boethius] |
5761 | God can do anything, but he cannot do evil, so evil must be nothing [Boethius] |
5766 | If you could see the plan of Providence, you would not think there was evil anywhere [Boethius] |