  Michael Stocker (1990) and Bernard Williams (1973 and 1981) and others have argued that it can be rational to regret the outcome of a correct moral choice. That is,  even when the right choice has been made, the rejected option can reasonably be regretted, and so the choice involves a genuine value conflict. This seems strange if the options are being compared in terms of a supervalue. How can we regret having chosen more rather than less of the same thing? Yet the phenomenon seems undeniable, and pluralism can explain it. If there are plural values, then one can rationally regret not having chosen something which though less good, was different.