The brain physically changes in response to life's experiences. To dismiss life experience and believe genius is exclusively innate is a hard pill to swallow.

By understanding how a thing works, the more power one has to change it. Therefor, the better one understands their own intelligence, the more power they have to change their intelligence. However, being able to tease apart intelligence requires a high prerequisite intelligence, muddying the water between innate and not. In whole, I do not think intelligence is exclusively nature or nurture.

Asking someone, "When about do you think you became a genius?" is a great question. I might have to steal that one next time I bump into a genius offline.

By that I meant that I haven't proved to be a genius so far. If I were to become a Nobel laureate in the future, people would see that I was a genius in retrospect.