> And when that variation/entropy back-and-forth between red and green is too high, the brain just melds them to yellow? Not “melds them”: it is yellow. A spec

> And when that variation/entropy back-and-forth between red and green is too high, the brain just melds them to yellow? Not “melds them”: it is yellow. A specific yellow, to a human, is any of the SPDs that triggers the same amount of “red” and “green” cone activity. It’s not some kind of brain interpretation trick, it’s literally the same signals reported by your eyes.