Linguistic competence is the system of linguistic knowledge possessed by native speakers of a language. It is in contrast to the concept of linguistic performance, the way the language system is used in communication. The concept was first introduced by Noam Chomsky[1] as part of the foundations for his generative grammar, but it has since been adopted and developed by other linguists, particularly those working in the generativist tradition. In the generativist tradition competence is the only level of language that is studied, because this level gives insights into the Universal Grammar, that generativists see as underlying all human language systems.