Published online by Cambridge University Press: 22 December 2008
The problem of explaining the knowledge possessed by a native speaker of a natural language and the philosophical problem of rule-following are juxtaposed, and the former is seen to be an instance of the latter. A recent solution to the rule-following problem is reviewed, with special attention to the consequences that the solution has for the nature of those concepts acquired from exemplars. The concept of a grammatical sentence is one of these. Finally, it is shown that, as a consequence, we can see the grammaticality of a sentence to be an abstract property, which is simultaneously objective and tied to the responses of competent speakers. Thus, we gain a better understanding of some central questions in the philosophy of linguistics.