This document provides a summary of the linguistic theories of Tamil linguist T.N. Ramachandran. It discusses his views on language acquisition, the language acquisition device, and transformational grammar. Ramachandran believed that children have an innate ability to learn any language. He argued that all languages have an underlying deep structure and surface structure, and that transformational grammar allows speakers to relate sentences back to their deep structure. The document examines several of Ramachandran's key theories regarding language learning and analysis.