The three-year-old, then, is a grammatical genius - master of most constructions, obeying rules farmore often than flouting them, respecting language universals, erring in sensible, adultlike ways, and avoiding many kinds of errors altogether.  -   Steven Pinker     Quotes
The three-year-old, then, is a grammatical genius - master of most constructions, obeying rules farmore often than flouting them, respecting language universals, erring in sensible, adultlike ways, and avoiding many kinds of errors altogether. Steven Pinker
 Genius