More commonly and subtly, a mental disorder may so distort an individual's beliefs that he may think he is doing right when in fact an act is terribly wrong - as, for example, when a person has the delusion that his wife has literally turned into a
zombie and that shooting her is the only way to protect himself from being eaten alive, or an inpatient
attacks the attendants on his ward when they come to take him to an appointment because he
believes they are alien beings sent to kill him.