You can't be a media critic without taking it like a champ when your reporting has been criticized. Rather than amend the copy of his article "The Newspaper of the Future" after learning he got his facts wrong, Jack Shafer wrote an entirely new article "Shafer Shanked It" where he discussed his mistakes and their effect on his original piece. The most telling (and most honest) of his amendments:
So allow me to take a mulligan. Times and Post headcount growth has not been as dramatic as I made it out to be, and the smaller numbers undermine my analysis.