Cotard Syndrome, or "Dead Man Syndrome", is living thinking you are dead. The person thinks he is dead or has lost part of his organs and totally denies that he exists, gradually starting to no longer take care of themselves or manifest suicidal instincts. In any case, nothing manages to have any emotional relevance for the person anymore, to the point that the only way to rationally explain this total absence of emotions is to believe that he is dead. Thanks for listening, JeanPaul