[bluefirebrand]

> Also there is a high overlap between autism and ADHD, many people have both characterizing them as opposite ends of a spectrum sounds like a stretch.

I think it's only a stretch if you think that someone only exists at a single point on that spectrum. If it's more like a spectrum of characteristics, then wouldn't it seem like strong autistic characteristics could exist at one end, strong adhd characteristics could exist at the other, and a lot of the shared overlapping characteristics exist in the middle?