There are extreme cases tru, but an extreme case of what remains to be untold, if I don't see a line I don't think there is one if u get me. A person deluded enuff to kill sum1 else for no reason other than say 'his shirt is green, green wants to kill me, I must kill it' is a person that the shrinks will call a 'paranoid schizophrenic', a man who stabs his girlfriend several times for not cooking his meal, well thats jus violence committed by a very sane man, but if he smoked cannabis, or used any other drugs, well they of course are a contributing factor to some temporary form of 'madness', naughty inaminate drugs, shame on you. There are too many variables to schizo/psychotic symptoms story that I can't even read anythin on it without pissin myself laffin, they're tryin to explain emotions, and the reason you act on them, and perceive it the way you do, and with any emotion 'psychotic' or otherwise, not even the person acting upon that emotion could say with 100% certainty why they acted they way they did, what was the contributing factors to why that emotion came about, and what were the contributing factors to the decision to actually act on the emotion. All very quantum mechanical, all very simple in its complexity, but all very, very far out of comprehension. Answer the question on psychosis and schizophrenia and you've answered the question for how concsiousness works. (btw consciousness is another word without definition, so lets see how far they get on that bastard)