In Our Knowledge of the Internal World, Robert Stalnaker describes how analytic philosophy has moved from taking the internal world as given and the external world as problematic, to taking the external world as given and the internal world as problematic. This is the shift from foundational projects like Russell's and Carnaps's to the problems of self-locating beliefs, discussed by Perry, Lewis, and Stalnaker, among others. Such beliefs appear not have ordinary objective contents. I will argue that these two problems are not really opposite. Rather, they both depend on one and the same basic underdetermination.