I probably never would have heard of the idea if someone hadn't pointed out its conspicuous omission on the census. I read completely through the original test census and it didn't even register as something so noteworthy on first pass... just another thing that I would probably understand better if I actually read more LessWrong, but since I hadn't, I'd leave my answer blank. Now I know a lot more about it and could probably (p=70%) actually put an answer down with some confidence.

Since it appears the final version of the census has been backedited onto the draft version, can anyone mention (rot13, probably, if it's that controversial) what the question was which was removed?