但狂躁抑郁症和精神分裂症都属于精神病范畴，其特征是患者无法控制自身行为和思想，其发作具有周期性，发作时患者不能被视为拥有自由意志的行为人。
Both manic-depressive illness and schizophrenia are psychotic conditions, characterized by the patient’s loss of control over his or her actions and thoughts, a recurrent state in which s/he cannot be considered an agent with free will.