 It is often supposed that incommensurable alternatives must be incomparable. But things are complicated once it is recognized that there is conceptual room for two alternatives that are not comparable as one better than the other or as equally good (and so are incommensurable according the conception of incommensurability identified above) to be comparable as ‘in the same league’ or ‘on a par,’ and thus not altogether incomparable, as would be the case if there were no positive relation connecting the overall value of each option (see Chang 2002). For the purposes of this discussion, the question of whether incommensurable alternatives are invariably incomparable can be put aside, since the dynamic choice problem that will be discussed in relation to incommensurability applies regardless of whether the incommensurable options at issue are incomparable or are instead comparable as on a par.