Summary
Virtually 1every child, without special2 training, exposed to surface level language data in interaction, 3builds for himself, -- in a short period4 of time and at a prelogical 5stage in his cognitive development --, a deep level,3 abstract and highly complex system of linguistic3 structure (and the complex underlying system governing its use: how and when to say what to whom). (Linsdford. Children’s Language and Learning)