For linguists, grammar refers to cognitive information underlying language use. Speakers of a language have a set of internalized rules[1] for using that language. These rules constitute grammar, and the vast majority of the information in the grammar is—at least in the case of one's native language—acquired not by conscious study or instruction, but by observing other speakers. Much of this work is done during early childhood; learning a language later in life usually involves a greater degree of explicit instruction. The term "grammar" can also be used to describe the rules that govern the linguistic behaviour of a group…
