Grammar is not a set of rules; it is something inherent in the language, and language cannot exist without it. It can be discovered, but not invented.
Charlton LairdAn amoeba is a formless thing which takes many shapes. It moves by thrusting out an arm, and flowing into the arm. It multiplies by pulling itself in two, without permanently diminishing the original. So with words. A meaning may develop on the periphery of the body of meanings associated with a word, and shortly this tentacle-meaning has grown to such proportions that it dwarfs all other meanings.
Charlton LairdLanguage is a living thing. It must survive in men's minds and on their tongues if it survives at all.
Charlton Laird