A skeptic who denies the existence of a community of fellow-speakers cannot make sense of meaningful thought in the skeptic's own case.

As Davidson suggests (cf. Davidson 1991: 157), his position here might be said to have certain similarities to that put forward in Wittgenstein’s Private Language Argument, at least under the interpretation given by Kripke (see Kripke 1982). Kripke takes Wittgenstein as arguing that it is impossible to make sense of what it is to follow a rule correctly, unless this means that what one is doing is following the practice of others who are like-minded: what makes our continuation of some addition