Originally posted by ValharuHe figured it out both physically and metaphysically though too, after he died and became Spectre. lol. Kinda cheating though. Also, with Parallax, he had to understand it completely to will it into existance, given the way the Lantern energy works.
Parallax had power to recreate the universe but whos got the smarts to figure it out on a drawing board.
But I get you..and I really have no clue who's smartest, lol. I was just messin' around.. Some characters are a lot closer though, simply due to their stature, like Guardians of OA for example, begin to completely understand the universe as children. Outside of all of these character types, it'd probably be Reed.