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{{Short description|Logical operator in modal logic}} ...rchives/sum2021/entries/logic-modal/ |access-date=5 February 2024 |chapter=Modal Logic}}</ref> ...

...y|logically consistent]] collection of statements is a possible world. The modal diamond operator <math>\lozenge</math> is used to express possibility: <mat ...upon how one views logic, as well as the relationship between logic and [[metaphysics]], for example, many philosophers following [[Saul Kripke]] have held that ...

...er at the [[University of Oxford]], where he has the title of Professor of Metaphysics, and a Tutorial Fellow at [[Oriel College]]. ...[[David Malet Armstrong]] and grounds resemblance relations in the sort of modal realism expressed in ''[[On the Plurality of Worlds]]'' by [[David Kellogg ...

* [[Possible world]], a construct in metaphysics to bring rigor to talk of logical possibility * [[Modal realism]], an account of possible worlds according to which they are all ju ...

'''Necessitarianism''' is a [[metaphysics|metaphysical]] principle that denies all mere possibility; there is exactly * [[Modal logic]] ...

...math> are true at <math>i</math>, or that the normal laws of [[logic]], [[metaphysics]], and [[mathematics]], fail to .... They have been around since the advent of possible world semantics for [[modal logic]], as well as world based semantics for non-classical logics, but hav ...

| subject = [[Modal realism]], [[possible worlds]] ...r]] [[David Lewis (philosopher)|David Lewis]] that defends the thesis of [[modal realism]].<ref>{{cite web |title=On the Plurality of Worlds |url=https://ww ...

...oncrete objects. It is a consequence of [[David Kellogg Lewis]]'s concrete modal realism that it is impossible that no concrete objects exist; for since wor ...immerman (eds), Oxford Studies in Metaphysics: volume 6, Oxford Studies in Metaphysics (Oxford, 2011; online edn, Oxford Academic, 1 May 2011), https://doi.org/10 ...

An '''accident''' ([[Ancient Greek|Greek]] {{lang|grc|συμβεβηκός}}), in [[metaphysics]] and [[philosophy]], is a property that the entity or substance has [[meta ...ingency]]. [[Non-essentialism]] argues that every property is an accident. Modal [[necessitarianism]] argues that all properties are essential and no proper ...

...http://plato.stanford.edu/entries/leibniz-modal/ | title = Leibniz's Modal Metaphysics | date = 2008-05-23 | accessdate = 2010-01-22 | encyclopedia = Stanford Enc ...be found in ''On the Ultimate Origination of Things'', ''The Discourse in Metaphysics'', ''On Freedom'', and throughout his works.<ref name="SEP"/> The term itse ...

...first=Russell |title=The Medieval Heritage in Early Modern Metaphysics and Modal Theory, 1400–1700 |last2=Nielsen |first2=L. O. |publisher=Springer Science ...

...ributions in [[philosophy of language]], [[philosophy of mind]], general [[metaphysics]], [[epistemology]], and [[philosophical logic]]. ...

{{Short description|Concept of philosophy and logic used to express modal claims}} ...aphysical]] status has been a subject of controversy in philosophy, with [[modal realists]] such as [[David Lewis (philosopher)|David Lewis]] arguing that t ...

| sub_discipline = {{hlist | [[Epistemology]] | [[logic]] | [[metaphysics]] | [[philosophy of language]]}} | main_interests = [[Epistemology]], [[metaphysics]], [[vagueness]] ...

...cal logic]], combined with the [[Logical truth|necessity]] operator from [[modal logic]]. For any two [[proposition]]s ''p'' and ''q'', the [[well-formed fo In modal logic, this formula means (roughly) that, in every possible world in which ...

...y the gods. It provides a good example of what it means to follow a law of metaphysics, and in the case of the dilemma it is used to express a law about the natur ...orlds |url=https://plato.stanford.edu/entries/possible-worlds/ |publisher=Metaphysics Research Lab, Stanford University |access-date=28 November 2020 |date=2017} ...

...s [[Aristotle]] to reject the principle in his ''[[Metaphysics (Aristotle)|Metaphysics]]'', when he writes that "it is not necessary that everything that is possi *[[Modal realism]] ...

...ical form, and the implications of those denotations for areas including [[metaphysics]], [[psychology of reasoning]], and [[philosophy of mathematics]]. ..., [[modal logic]], [[probability theory]], [[Angelika Kratzer|Kratzer]]ian modal semantics, and [[dynamic semantics]].<ref>{{cite encyclopedia |last= Edging ...

...n many such statements. The distinction is used regularly in analytical [[metaphysics]] and in [[philosophy of language]].<ref>[http://semanticsarchive.net/Archi ...idered here: a context of thought, a context of desire, and a context of [[modal logic|modality]]. ...

'''Modal realism''' is the view propounded by the philosopher [[David Lewis (philoso ...patial and temporal parts but also modal parts. This contrasts with Lewis' modal realism, according to which each object only inhabits one possible world. ...