9.42 Willfully-Defined is a concept in the field of law that refers to a person's deliberate and voluntary choice to act in a certain way. It is used to determine if a person is legally accountable for their actions. There are two types of 9.42 Willfully-Defined: voluntary and involuntary. Voluntary refers to a person's conscious decision to do something, whereas involuntary refers to a person's subconscious or unknowing decision to do something. In either case, the action must be intentional for the person to be held responsible for their actions.