Well, for instance, those people who are non-functioning autistic. The ones that we would consider near-braindead. How do we know what goes on in their head? They might not show anything going on, but for all we know, they might be solving the meaning of life and shit like that. Perhaps the less functioning the autism is, the greater the mind-power. Who knows. I personally think it would be cool to be in my own little world where I just absorb all knowledge and have an understanding of everything.