Crude obfuscation is the stock in trade of many political actors. Not so the president of Iran. This column is about Iran. But first a word about a bearded bully closer to home. On Monday, New York Times columnist Paul Krugman accused this newspaper of "crude obfuscation" for failing to run a correction for a mistake I made in a recent column on income inequality. "Oh, and for the record," he wrote with his customary charm, "at the time of writing