Chomsky Theory of Language Development describes his theory as language developing through natural cognitive ability (Torr, 2015). Instead of the idea of ​​learning language from social interactions and other people, language is something already in the mind that is unlocked (grammar before meaning, nativist perspective). This innate ability is called a “Language Acquisition Device (LAD)” (Chomsky 1987, cited in Harris, 2009, pp.12) and is something that children are born with. This device is not related to and is not modified by the child's environment and social circumstances (Torr, 2015). The theory is considered unpopular because of a question researchers asked in its early stages: (“How could children learn the underlying syntactic rules of the language based on their exposure to such little linguistic input?” (Torr 2015, pp. . 244)). The question was later answered with the idea of ​​LAD. Finally, Halliday characterized the theory, expressing “…learning structure is really at the heart of the language learning process…it is not too far-fetched to recognize this in the use of the term acquisition…so language itself is a good of some kind that the the child must acquire possession of it in the course of maturation' (Halliday, 1975. Cited in Torr 2015, pp. 244) essentially stating that language development could be a combination of both theories. Although he was unpopular with the two theories, Chomsky was a major influence