Does public ignorance defeat deliberative democracy?

Abstract Richard Posner and Ilya Somin have recently posed forceful versions of a common objection to deliberative democracy, the Public Ignorance Objection. This objection holds that demonstrably high levels of public ignorance render deliberative democracy practically impossible. But the public?ignorance data show that the public is ignorant in a way that does not necessarily defeat deliberative democracy. Posner and Somin have overestimated the force of the Public Ignorance Objection, so the question of deliberative democracy's practical feasibility is still open.