Henchy considered personality disorders in varying degrees. For example, mental disorder is described as mental illness or mental handicap but does not include violent personality disorder. Violent personality disorder is defined as a persistent disorder or disability of personality which manifests itself in abnormally violent or aggressive behaviour. The point was made that psychiatrists distinguish between mental disorder and personality disorder and state that the latter, of itself, will not exonerate a person from criminal responsibility if he is shown to have the guilty intent, the mens rea of which he is capable. If his condition is persistently violent, his own safety and the safety of society require that special measures be taken for his custody and care. It was suggested that special institutions be set up for such persons.