No way denying her prowess in calculations. Simply curious if it translates to multi-dimensional intelligence or was it limited to calculations. Also, I am not questioning her general intelligence, but when I said fluke, I meant if growth/difference in some part of brain gave her 1 in a billion intelligence but limited only to mathematical calculations.

In Ramanujan's biography, there is a mention of a british guy who was very fast at calculations. He was faster than Ramanujan himself. Unlike Ramanujan, that guy had easy access to all the modern math literature of the time but still he wasn't a mathematician. And Ramanujan became first class mathematician even without any resources or formal education.

I think doing calculation is mechanical skill. But gaining insights from those calculations is wholly different skill.

I am pretty confident a lot of extreme outliers do have some innate predisposition in any field. It is such that the world beaters have their talent identified, nurtured and perfected at the right age and an outlet created. Also i think it is considered impolite to completely base our intelligence, understanding or creativity on some natural gift nowadays due to some kind of just world fallacy. Although i am still inclined to personally believe that nurture is more important and you can do many good things reasonably well if your specific talent was nurtured well and you did not have some unfortunate mental deficiency that you were born with. Till recently very few people in the world had the right kind of nurture - education. I had a lot of challenges in some fields when in school, however unlike in the Western world the school system in my location was rigid and i could not improve on my weaknesses.