Originally Posted by Val
I may not have been as clear as I could have been: he actually thinks very highly of master craftsmen. The top tier of this group are people who are brilliant at something technical (such as mathematics) and who are able to focus like crazy on an idea and and use their abilities to really really carry it through.

Quite true.

Von Neumann's biographer put Johnny in the Craftsman category. Someone would have the insight and Johnny would make it whole.