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Single Idea 7869

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

Full Idea

Basing content on possible worlds that result in truth leaves no room for thoughts about genuine impossibilities, since there are not possible worlds whose actuality would make an 'impossible thought' true.

Gist of Idea

Truth conditions in possible worlds can't handle statements about impossibilities

Source

David Papineau (Thinking about Consciousness [2002], 3.7)

Book Ref

Papineau,David: 'Thinking about Consciousness' [OUP 2004], p.88

A Reaction

Negative existentials like 'no rabbits in this room' and 'no snakes in this room' seem to have the same truth conditions as well. I suppose the sentences must be translated into a logical form which suits the theory, with negation stuck on the end.

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]