 Despite Ross’s denial that there is any general method for estimating the comparative stringency of prima facie duties, there is a further strand in his exposition that many find irresistible and that tends to undercut this denial. In the very same paragraph in which he states that he sees no general rules for dealing with conflicts, he speaks in terms of “the greatest balance of prima facie rightness.” This language, together with the idea of “comparative stringency,” ineluctably suggests the idea that the mapping function might be the same in each case of conflict and that it might be a quantitative one. On this conception, if there is a conflict between two prima facie duties, the one that is strongest in the circumstances should be taken to win. Duly cautioned about the additive fallacy (see  section 2.3),  we might recognize that the strength of a moral consideration in one set of circumstances cannot be inferred from its strength in other circumstances. Hence, this approach will need still to rely on intuitive judgments in many cases. But this intuitive judgment will be about which prima facie consideration is stronger in the circumstances, not simply about what ought to be done. 