Abstract
Noam Chomsky influenced the Linguistics and Psychology development decisively in the twentieth century, and was one of the cognitive science founders. In philosophy, his influence was important too, but the most of his observations about natural language semantics never was accepted by mainstream philosophy of language. The externalism of the leading persons in that philosophical current was just incompatible with the internalist approach proposed at the outset by Chomsky to language study. In this article, I highlight the points in which the externalist philosophy of language and the Chomskyan internalism get attrition in a more impressive way by making explicit the arguments that Chomsky presents to defend your position and to attack the externalist view.