[chrischen]

I talk to myself, even when not working. So yes. He's just special.

Sometimes if you're eager to say something to real people, you may talk to yourself (ADHD people do it). If you're standing right there and he's talking to himself, then he either doesn't know you're there, or it's just helping him think.

[j_baker]

Erm... I have ADHD and I don't do it.

[chrischen]

Well there are different types of ADHD. It's related to the fact that ADHD people have bad working memory. So practicing how they would say stuff is a way to get it out before they forget it.