Sentences have propositions in them but sentences are not identical to propositions.
If I say ‘the bottle is on the table’ that is a sentence with a proposition, which can be said in another language, or in a different way – ‘the table is positioned underneath a bottle’.
Possible worlds are full of propositions, but propositions are not in the world and are not the sentences they are in, so what are they?
Most philosophers say they are abstract objects, Plato said there is a world of universal forms, but others believe they bloat ontology.
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