▁of ▁ag ency , ▁where ▁one ▁must ▁believe ▁they ▁are ▁an ▁agent ▁in ▁order ▁to ▁function ▁and ▁develop ▁a ▁theory ▁of ▁mind . ▁ ▁The ▁notion ▁of ▁levels ▁of ▁decision ▁is ▁presented ▁in ▁a ▁different ▁manner ▁by ▁Frankfurt . ▁Frankfurt ▁arg ues ▁for ▁a ▁version ▁of ▁compat ibil ism ▁called ▁the ▁" h ier arch ical ▁mesh ". ▁The ▁idea ▁is ▁that ▁an ▁individual ▁can ▁have ▁conflic ting ▁des ires ▁at ▁a ▁first - order ▁level ▁and ▁also ▁have ▁a ▁desire ▁about ▁the ▁various ▁first - order ▁des ires ▁( a ▁second - order ▁desire ) ▁to ▁the ▁effect ▁that ▁one ▁of ▁the ▁des ires ▁prev ails ▁over ▁the ▁others . ▁A ▁person ' s ▁will ▁is ▁identified ▁with ▁their ▁effective ▁first - order ▁desire , ▁that ▁is , ▁the ▁one ▁they ▁act ▁on , ▁and ▁this ▁will ▁is ▁free ▁if ▁it ▁was ▁the ▁desire ▁the ▁person ▁wanted ▁to ▁act ▁upon , ▁that ▁is , ▁the ▁person ' s ▁second - order ▁desire ▁was ▁effective . ▁So , ▁for ▁example , ▁there ▁are ▁" w anton ▁add ict s ", ▁" un w illing ▁add ict s " ▁and ▁" w illing ▁add ict s ". ▁All ▁three ▁groups ▁may ▁have ▁the ▁conflic ting ▁first - order ▁des ires ▁to ▁want ▁to ▁take ▁the ▁drug ▁they ▁are ▁add icted ▁to ▁and ▁to ▁not ▁want ▁to ▁take ▁it . ▁ ▁The ▁first ▁group , ▁want on ▁add ict s , ▁have ▁no ▁second - order ▁desire ▁not ▁to ▁take ▁the ▁drug . ▁The ▁second