29 ideas
5750 | Consistency is modal, saying propositions are consistent if they could be true together [Melia] |
5737 | Predicate logic has connectives, quantifiers, variables, predicates, equality, names and brackets [Melia] |
5744 | First-order predicate calculus is extensional logic, but quantified modal logic is intensional (hence dubious) [Melia] |
9358 | There are several logics, none of which will ever derive falsehoods from truth [Lewis,CI] |
9357 | Excluded middle is just our preference for a simplified dichotomy in experience [Lewis,CI] |
9364 | Names represent a uniformity in experience, or they name nothing [Lewis,CI] |
5740 | Second-order logic needs second-order variables and quantification into predicate position [Melia] |
5741 | If every model that makes premises true also makes conclusion true, the argument is valid [Melia] |
5735 | Maybe names and predicates can capture any fact [Melia] |
5736 | No sort of plain language or levels of logic can express modal facts properly [Melia] |
5746 | The Identity of Indiscernibles is contentious for qualities, and trivial for non-qualities [Melia] |
5738 | We may be sure that P is necessary, but is it necessarily necessary? [Melia] |
5732 | 'De re' modality is about things themselves, 'de dicto' modality is about propositions [Melia] |
9362 | Necessary truths are those we will maintain no matter what [Lewis,CI] |
5739 | Sometimes we want to specify in what ways a thing is possible [Melia] |
5734 | Possible worlds make it possible to define necessity and counterfactuals without new primitives [Melia] |
5742 | In possible worlds semantics the modal operators are treated as quantifiers [Melia] |
5743 | If possible worlds semantics is not realist about possible worlds, logic becomes merely formal [Melia] |
5749 | Possible worlds could be real as mathematics, propositions, properties, or like books [Melia] |
5751 | The truth of propositions at possible worlds are implied by the world, just as in books [Melia] |
9365 | We can maintain a priori principles come what may, but we can also change them [Lewis,CI] |
9312 | Consciousness is reductively explained either by how it represents, or how it is represented [Kriegel/Williford] |
9313 | Experiences can be represented consciously or unconsciously, so representation won't explain consciousness [Kriegel/Williford] |
9315 | Red tomato experiences are conscious if the state represents the tomato and itself [Kriegel/Williford] |
9316 | How is self-representation possible, does it produce a regress, and is experience like that? [Kriegel/Williford] |
9314 | Unfortunately, higher-order representations could involve error [Kriegel/Williford] |
9361 | We have to separate the mathematical from physical phenomena by abstraction [Lewis,CI] |
5748 | We accept unverifiable propositions because of simplicity, utility, explanation and plausibility [Melia] |
9363 | Science seeks classification which will discover laws, essences, and predictions [Lewis,CI] |