I grew up across the street from a mixed race couple. The husband was black and an engineer. Had autocad on a 386 in the 1980s. He had one son that's literally a genius, Ph.D in physics from a major University, literally designs lasers for various industrial uses. The other kid literally drooled on himself. I literally mean literally. It was so bad, they bought him hyper-color shirts, so he could blame the discoloration on body heat.