JOURNALISM at the New York Times: “Whether Carr discovered his mistake by himself or, more likely, someone at the Post called it to his attention, I do not know. What I do know is that the Times would never have published a Letter to the Editor pointing out Carr’s error. That’s because, as a matter of policy, the Times will not publish letters that challenge the facts in any piece written by its own columnists or reporters. I learned this the simple way: by writing such a letter myself.”