i've know a few people with schitzophrenia-and my mom's a psyciatric Nurse Practitioner-so i'll tell you this much : schitzophrenia is a mental handicapp where your brain cannot always distinguish thought from action. this means a schitzo will be very normal on the surface.
real-life example : jen is schitzo, she KNOWS right from wrong, yet while standing in line at the store-she kicks the man in front of her. When he turns to confront her-she turns to the child standing in line behind her and says "You should'nt have done that." in the tone and demeanor of someone who just watched it happen instead of MADE it happen. she knows not to kick people, she just does not have the complete system of "thinking something as opposed to saying or doing it" and it is due to an inconsistency in her brain