There is a problem in understanding quite what a ‘synthesizing category’ or ‘covering value’ is. How does the covering value determine the relative weightings of the constituent values? One possibility is that it does it by pure stipulation—as a martini just is a certain proportion of gin and vermouth. However, stipulation does not have the right sort of explanatory power. On the other hand, if a view is to remain pluralist, it must avoid conflating the super scale with a super value. Chang arg