>I would imagine that in a primitive environment, you will be eaten if you can't trust your hearing. When I talk to myself in my head, I normally don't find my

>I would imagine that in a primitive environment, you will be eaten if you can't trust your hearing. When I talk to myself in my head, I normally don't find myself saying, "Who's there? Who said that?" Additionally, if someone was the physically appear in my room and start a conversation with me, I think I'd immediately figure it out. There's some mechanism that lets us differentiate from internal and external voice that we experience every day. I imagine the same applies on some level to auditory hallucinations, if those really are any different from having internal conversations.