If you add Intelligence, Practicality, and Maturity together in some kind of balance, do you know what you'd get?.......................Simply put, you'd have common sense, and if you could master using all three in a balance you'd have a higher form of common sense......................which is all Genius really is.
Being a genius is not about solving really complex equations...a genius is someone who has the ability to simplify a problem, so that they can solve it. Over-complicating simple matters is the only thing that stops us all being geniuses!!!