Except that Chomsky predicts that these kinds of rules are embedded in the mind and do not need to be explicitly learned.
I think that Chomsky's real question is, how is it that most people know these things by age 3 without having to have a PhD in linguistics in order to understand it all? It is a very simple question with very profound consequences. But that is often the case with simple questions. Einstein asked a simple question and got the special and general theories of relavitity as a consequence.
Couldn't "embedded in the mind" be another way to say "inherent in the physical structure of the brain?"