> The disagreement is over an objective, verifiable fact.
As with the AIDS and Tom Sawyer examples above, sometimes we disagree with a questioner over a matter of verifiable, objective fact.
In these cases, I believe it is best to use comments or editing to correct the questioner (politely!). The Tom Sawyer bit is probably tame enough for a quick edit -- the author's name has no direct bearing on how a potential answerer would evaluate the content of the work. The AIDS one would probably be better served by a comment, because it is a difference that has direct bearing on how one would answ…