Grice: Implicatures of Credence

Speranza

Grice presents a puzzle about belief and credence, which takes the form of three independently supported views that are mutually inconsistent.  The first is the view that S has a modal belief that p (e.g., S believes that probably-p) if and only if S has a corresponding credence that p.  The second is the view that S believes that p only if S has some credence that p.  The third is the view that, possibly, S believes that p without a modal belief that p.