Today we start with a quiz. Two politicians, one black and one white, have a disagreement on an issue. One airs an opinion, and the other responds with a racial insult. What will happen next? A) The politician who used the racial insult will be roundly and widely denounced and forced to resign from office. B) Nothing. The answer is: It depends. It's impossible to determine the correct answer without knowing whether the epithet came from the white politician or the black politician. In a society that treats racism, correctly, as a grave offense, it shouldn't really matter. But apparently...