Dennis, a new york city investment broker, quit his job in a fit of rage after being accused of embezzling thousands of dollars of his clients' money. four months later, the police discovered dennis driving a cab in los angeles. dennis claimed that his name was actually michael hart, that he had always been a cab driver in los angeles, and that he had no knowledge of dennis. even after he was positively identified as dennis, “michael hart” insisted that he was someone else. assuming that he was not faking his condition to escape arrest, dennis was probably suffering from: