An individual's beliefs can be seen as rationally related to one another in a kind of web. These beliefs, however, may not form a single, seamless web. There may exist smaller, largely self-contained webs with few or no rational relations to the larger web. Such "webs of faith" make it possible for reasonable deliberators to persist in a disagreement even under ideal deliberative conditions. The possibility of reasonable disagreement challenges the assumption that rationality should lead to consensus and presents an obstacle to the goals of liberal democracy.