[tremon]

This to me overstretches the definition of teaching. No, a human baby is not "taught" language, it learns it independently by taking cues from its environment. A child absolutely comes with an innate ability to recognize human sound and the capability to reproduce it.

By the time you get to active "teaching", the child has already learned language -- otherwise we'd have a chicken-and-egg problem, since we use language to teach language.