On Saturday John Coatsworth, acting dean of Columbia University's School of International and Public Affairs, made the remark that "if Hitler were in the United States and . . . if he were willing to engage in a debate and a discussion to be challenged by Columbia students and faculty, we would certainly invite him." This was by way of defending the university's decision to host a speech yesterday by Iranian President Mahmoud Ahmadinejad.

An old rule of thumb in debate tournaments is that the first one to say "Hitler" loses....