  Reid assumes that anybody who holds that there is a law linking motives and behaviors will thereby accept the claim that human beings always act on the strongest of their motives. However, Reid claims that there are various ways in which the notion of the strongest motive can be defined—there are various measures of strength of motive—and depending which definition is employed we find that it is either false or trivial and uninformative to say that people always act on the strongest motive.