- Claims made within the domain of discourse are taken to be truth-apt; that is, true or false
- The domain of discourse is to be interpreted at face value—not reduced to meaning something else
- The aim of discourse in any given domain is not truth, but some other virtue(s) (e.g., simplicity, explanatory scope).
Strong fictionalism about possible worlds
- It is possible that P iff the translation of P into the language of a fiction F (containing possible worlds) holds according to F.
- It is necessary that P iff the translation of P into the language of a fiction F (containing possible worlds) always holds.
Timid fictionalism about possible worlds
Objections and criticisms
- Hale dilemma
- Fictional fetishism