Cognitive linguistics is an interdisciplinary branch of linguistics, combining knowledge and research from cognitive science, cognitive psychology, neuropsychology and linguistics. Models and theoretical accounts of cognitive linguistics are considered as psychologically real, and research in cognitive linguistics aims to help understand cognition in general and is seen as a road into the human mind. There has been scientific and terminological controversy around the label "cognitive linguistics"; there is no consensus on what specifically is meant with the term. Background The roots of cognitive linguistics are in Noam Chomsky’s 1959 critical review of B. F. Skinner’s Verbal Behavior. Chomsky's rejection of behavioural psychology and his subsequent anti-behaviourist activity helped bring about a shift of focus from empiricism to mentalism in psychology under the new concepts of cognitive psychology and cognitive science. Chomsky considered linguistics as a subfield of cognitive science in the 1970s but called his model transformational or generative grammar. Having been engaged with Chomsky in the linguistic wars, George Lakoff united in the early 1980s with Ronald Langacker and other advocates of neo-Darwinian linguistics in a so-called ”Lakoff–Langacker agreement”. It is suggested that they picked the name ”cognitive linguistics” for their new framework to undermine the reputation of generative grammar as a cognitive science. Consequently, there are three competing approaches that today consider themselves as true representatives of cognitive linguistics. One is the Lakoffian–Langackerian brand with capitalised initials (Cognitive Linguistics). The second is generative grammar, while the third approach is proposed by scholars whose work falls outside the scope of the other two. They argue that cognitive linguistics should not be taken as the name of a specific selective framework, but as a whole field of scientific research that is assessed by its evidential rather than theoretical value. Approaches Generative Grammar Generative grammar functions as a source of hypotheses about language computation in the mind and brain. It is argued to be the study of 'the cognitive neuroscience of language'. Generative grammar studies behavioural instincts and the biological nature of cognitive-linguistic algorithms, providing a computational–representational theory of mind. This in practice means that sentence analysis by linguists is taken as a way to uncover cognitive structures. It is argued that a random genetic mutation in humans has caused syntactic structures to appear in the mind. Therefore, the fact that people have language does not rely on its communicative purposes. For a famous example, it was argued by linguist Noam