To think parents can teach their children how to speak is ludicrous. Language acquisition occurs in all children in the same succession of stages. 2 Language is acquired in early childhood and adults have few memories of the intense effort that went into the learning process any more than remembering when we learned to take a first step. Adults have difficulty dissociating their memories of school lessons from those of true language learning. FACT 4 Rules learned in school were only conventions of an educated society which are arbitrary to learning by anyone, at anytime, and any place.
Every adult can create or understand an infinite number of sentences never heard before.
We do not experience everything we know. An adult would know what word or sentence is acceptable to the situation, a child gradually makes these distinctions by being socialized. Listed below are examples of how native users of English would easily spot ambiguity. Green ideas sleep colorless furiously. A native speaker knows this statement is ungrammatical.