The claim is often made about how important it is to have a discussion with those with whom we disagree. Possibly some useful information was obtained from the exchanged earlier this week, though I doubt it. What is most disappointing to me is that universities who say that they would want to invite Hitler to talk, have a hard time inviting any conservatives to talk. It seems that it is one thing to encourage discussions within the broad range of normal discussants. Is there anything that a person could do that would cause him not to be able to be invited to speak? A representative of the KKK wouldn't get invited, right? A mass murderer wouldn't get invited, right?