This answer is a new one on me. It seemed like a duplicate of an earlier question to me, so I flagged it as such, then this chap comes along and posts an answer agreeing with me, quoting Zoredache's excellent accepted answer to the earlier question, and saying very little else besides.
I don't have any idea what the right action is now. Leave it to stand? Edit it out? Nominate it for deletion? Flag it?