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Single Idea 7774

[filed under theme 19. Language / C. Assigning Meanings / 8. Possible Worlds Semantics ]

Full Idea

The possible worlds construal affords an elegant algebra of meaning by way of set theory: e.g. entailment between sentences is just the subset relation - S1 entails S2 if S2 is true in any world in which S1 is true.

Gist of Idea

Possible worlds explain aspects of meaning neatly - entailment, for example, is the subset relation

Source

William Lycan (Philosophy of Language [2000], Ch.10)

Book Ref

Lycan,William G.: 'Philosophy of Language' [Routledge 2000], p.153

A Reaction

We might want to separate the meanings of sentences from their entailments (though Brandom links them, see Idea 7765).

Related Idea

Idea 7765 The use of a sentence is its commitments and entitlements [Brandom, by Lycan]

The 17 ideas with the same theme [giving full meaning by specifying some set of possible worlds]:

11968 The intension of a sentence is the set of all possible worlds in which it is true [Carnap, by Kaplan]
16469 Plantinga has domains of sets of essences, variables denoting essences, and predicates as functions [Plantinga, by Stalnaker]
16470 Plantinga's essences have their own properties - so will have essences, giving a hierarchy [Stalnaker on Plantinga]
16410 Extensional semantics has individuals and sets; modal semantics has intensions, functions of world to extension [Stalnaker]
16448 Possible world semantics may not reduce modality, but it can explain it [Stalnaker]
7869 Truth conditions in possible worlds can't handle statements about impossibilities [Papineau]
7868 Thought content is possible worlds that make the thought true; if that includes the actual world, it's true [Papineau]
7773 A sentence's truth conditions is the set of possible worlds in which the sentence is true [Lycan]
7774 Possible worlds explain aspects of meaning neatly - entailment, for example, is the subset relation [Lycan]
9207 If sentence content is all worlds where it is true, all necessary truths have the same content! [Fine,K]
17701 Possible worlds semantics has a nice compositional account of modal statements [Mares]
13248 We can rest truth-conditions on situations, rather than on possible worlds [Beall/Restall]
14698 Possible worlds semantics uses 'intensions' - functions which assign extensions at each world [Schroeter]
14699 Possible worlds make 'I' and that person's name synonymous, but they have different meanings [Schroeter]
14709 Possible worlds semantics implies a constitutive connection between meanings and modal claims [Schroeter]
14719 In the possible worlds account all necessary truths are same (because they all map to the True) [Schroeter]
18417 Possible worlds accounts of content are notoriously coarse-grained [Cappelen/Dever]