Unhappy about something you did in your past? Wish it hadn’t happened? Good news! You can simply say that you undid it, “retroactively”! No problem!

This handy technique via the Romney campaign, who admit that yeah, sure, Romney was the official, legal Chairman, CEO and President of Bain Capital during that 1999-2002 period when they caused lots of layoffs, but that Mitt “retired retroactively to February of 1999″ when he decided in 2002 that he wished he hadn’t been the official, legal Chairman, CEO and President of Bain since 1999.

(Folks on Twitter are having a field day with this one.)