26 ideas
17266 | Using modal logic, philosophers tried to handle all metaphysics in modal terms [Correia/Schnieder] |
5750 | Consistency is modal, saying propositions are consistent if they could be true together [Melia] |
17263 | Why do rationalists accept Sufficient Reason, when it denies the existence of fundamental facts? [Correia/Schnieder] |
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] |
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] |
17270 | Is existential dependence by grounding, or do grounding claims arise from existential dependence? [Correia/Schnieder] |
17268 | Grounding is metaphysical and explanation epistemic, so keep them apart [Correia/Schnieder] |
5736 | No sort of plain language or levels of logic can express modal facts properly [Melia] |
17267 | The identity of two facts may depend on how 'fine-grained' we think facts are [Correia/Schnieder] |
5735 | Maybe names and predicates can capture any fact [Melia] |
9295 | Not only substances have attributes; events, actions, states and qualities can have them [Teichmann] |
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] |
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] |
9293 | Body-spirit interaction ought to result in losses and increases of energy in the material world [Teichmann] |
5748 | We accept unverifiable propositions because of simplicity, utility, explanation and plausibility [Melia] |
9292 | The Soul has no particular capacity (in the way thinking belongs to the mind) [Teichmann] |
9294 | No individuating marks distinguish between Souls [Teichmann] |