Disimplicature

Speranza

Differences among scientific, mathematical, and ethical subject matters motivate a pluralism where distinct domains of subject matter are associated with distinct truth properties and logics. However, it is unclear how such pluralism might accommodate potentially attractive epistemic norms, such as that one ought to believe only what is true, and that one ought to believe what is logically true. 

Grice shows how such pluralism can accommodate such norms by supplementing the account developed in Yu (2017a,b) with epistemic, doxastic, and deontic operators. The upshot is that pluralism is compatible with, even if not committed to, monism about epistemic norms.