In the view, the newborn infant brain already contains a University Grammar (UG) which forms the basic of competence in the particular language the child goes on to speak.
This linguistic competence is seen as modular, that is to say separate from other mental abilities.
If we accept Chomsky’s view, language, as on object of academic enquiry, becomes something more biological than social and similarities between languages outweigh differences.
In addition, language is separated from other factors involved in its use such as body language or cultural knowledge.
While the view maybe valid for certain purposes in linguistics, can have a reductive and constraining effect excluding from consideration those very factors with which the discipline is most concerned.