I would also add that most modern linguists tend to view only instantaneous language production (i.e. casual speech and sign language) as representative of natu

I would also add that most modern linguists tend to view only instantaneous language production (i.e. casual speech and sign language) as representative of natural grammar. Once you incorporate conscious processes into it (as in writing), you interfere with the way people produce their language. With this in mind, most of what is taught in school or learned through practice does little to affect our speech patterns; nearly all of them are acquired from our family and social group at an early age. Not my exact field, but I believe there is a bevy of research to say that adults change syntactic structures of their speech only once in a blue moon. So in this sense, there is almost 0 explicit learning in the process. Kobe Bryant had his shooting skills straight from the womb.