More than one way to skin a cat: Addressing the arbitration problem in developmental science.

David Pietraszewski's theory of social groups offers a developmentally plausible account of how we reason about group membership, as it delineates clear boundaries to the hypothesis space that children must navigate. Merits notwithstanding, the account remains silent with respect to the arbitration problem: It does not explain how children can appropriately select among competing frames when interpreting social interactions.