Hi Greg, I would imagine there are people that smart. I am 67 yrs young and I have met many brilliant people. For about 50 years I have played chess and bridge so I have come across many people who can amaze you with their incredible minds. I knew a Doctor who passed all his exams without ever attending a lecture. When he came to collect his Doctors diploma the professor asked him who he was and why he didn't know him my friend had an extraordinary photographic memory and when it came exam time he would just flick to the page in the encyclopaedia in his mind and just copy the words he saw.
I have more true stories.