  It is worth noting that the pluralist argument is not that all cases of value conflict point to pluralism. There may be conflicts because of ignorance, for example, or because of irrationality, and these do not require positing plural values. Stocker argues that there are (at least) two sorts of value conflict that require plural values. The first is conflict that involves choices between doing things at different times. Stocker argues that goods become different values in different temporal situations, and the monist cannot accommodate this thought. The other sort of case (which Williams also points to) is when there is a conflict between things that have different advantages and disadvantages. The better option may be better, but it does not ‘make up for’ the lesser option, because it isn’t the same sort of thing. Thus there is a remainder—a moral value that is lost in the choice, and that it is rational to regret.  