The will is not effective until it is signed by a personable person.直到具有权力能力和行为能力的人签字以后，这个遗嘱才生效。He denies murder but admits manslaughter on the grounds of diminished responsibility.他否认谋杀，但是以限制行为能力为由承认误杀。Alcoholism can result in an inability to cope.酒精中毒会导致行为能力丧失。