Our approach is based on the observation that COREF's contribution tracking can be viewed as assigning a fate to every dialogue state it entertains as part of some thread of interpretation.
if we consider the agent's contribution tracking retrospectively, every dialogue state can be assigned a fate of correct or incorrect, where a state is viewed as correct if it or some of its descendants eventually capture all the probability mass that COREF is distributing across the viable surviving states, and incorrect otherwise.