““We are encouraged to believe that there is something arrogant and benighted about taking our own views to be true to the exclusion of the beliefs of others. We must be tolerant of the viewpoints of others, we are told, and, evidently, tolerance is often taken to be a matter of never thinking the beliefs of others to be false. But if this is the meaning of tolerance, then it would appear that the only tolerant people are those who believe nothing at all—including the proposition, We must be tolerant.””