Theoretical Linguistics is the branch of linguistics that focuses on understanding the underlying principles and structures of language. It explores how languages are formed, how they function, and the rules that govern their use. Researchers in this field study various aspects of language, including syntax, semantics, and phonetics, to develop models that explain how humans communicate. One of the key goals of theoretical linguistics is to create a comprehensive framework that can describe all human languages. This involves examining the similarities and differences between languages, as well as investigating concepts like universal grammar, proposed by linguist Noam Chomsky. By doing so, theoretical linguists aim to uncover the cognitive processes involved in language acquisition and use.