I think since you asked him in email, he is just trying to cover his butt. It is not really personal, it is more a legal answer - if someone isn't sleeping, can they become dangerous? Yes, they have had studies recently that people are falling asleep driving more than anything else. We know the brain needs its sleep, we just don't know why. He can not have written, to ANYONE, no, it doesn't matter if you don't sleep.

Did T initiate this email exchng, or was he responding to something you said? BTW, I was never allowed to babysit my brother's kid, but had to tell my mother to stop touching him inappropriately when she changed his diaper, as she didn't think there was anything wrong with that, and she had full access to him. Who's the crazy one?