16 ideas
10282 | Logic is the study of sound argument, or of certain artificial languages (or applying the latter to the former) [Hodges,W] |
10283 | A formula needs an 'interpretation' of its constants, and a 'valuation' of its variables [Hodges,W] |
10284 | There are three different standard presentations of semantics [Hodges,W] |
10285 | I |= φ means that the formula φ is true in the interpretation I [Hodges,W] |
10288 | Down Löwenheim-Skolem: if a countable language has a consistent theory, that has a countable model [Hodges,W] |
10289 | Up Löwenheim-Skolem: if infinite models, then arbitrarily large models [Hodges,W] |
10287 | If a first-order theory entails a sentence, there is a finite subset of the theory which entails it [Hodges,W] |
10286 | A 'set' is a mathematically well-behaved class [Hodges,W] |
6375 | The taste of chocolate is a 'finer-grained' sensation than the taste of sweetness [Polger] |
3158 | Theories of intentionality presuppose rationality, so can't explain it [Dennett] |
6381 | The mind and the self are one, and the mind-self is a biological phenomenon [Polger] |
3159 | Beliefs and desires aren't real; they are prediction techniques [Dennett] |
6378 | Teleological functions explain why a trait exists; causal-role functions say what it does [Polger] |
6380 | Identity theory says consciousness is an abstraction: a state, event, process or property [Polger] |
6379 | A mummified heart has the teleological function of circulating blood [Polger] |
6377 | Teleological notions of function say what a thing is supposed to do [Polger] |