@apropos @deVoid I've heard that before, but I don't think it's true. People don't have a visceral disgust reaction to seeing monkeys, chimps, apes, or people of other ethnicity (often they get curious, expressed as both interest and fear).

I think uncanny valley has more to do with avoiding people with serious aliments. They may be contagious, and it may even be as simple as not wasting limited resources on the deformed retard.