“There are prerequisites for democratic discourse to be successful: people must be willing to discuss the issues, provide reasons for their views, and be open to persuasion; and, in addition, the participants in the discussion must be able to analyze, evaluate, and debate the reasons that others offer for their views. In other words, there must be a commitment to reason together in terms everyone can understand. That is not possible if religious doctrines are offered as a justification for public policy positions—not in a country that is religiously pluralistic and includes a significant number of nonbelievers.”