A user flagged a comment of another user, with the specific request to delete the other user's comment because it is "factually incorrect".
Now, I'm inclined to just ignore flags like this, as I've thought that the job of the moderator is to look after the community's interests and to catch/prevent/clean-up-after abuse; you know, little odd jobs here, little lubrication there. I'm pretty sure the community didn't elect little-o-me to be the ultimate authority on what's right and what's wrong (mathematically)!
To play the devil's advocate against myself, I realize that perhaps Mathematics.SE is the only StackExchange site in which "correctness" can be largely decided (please don't quibble with model-theoretic issues, or things about AC/ADC etc here). So if I were to have been a properly educated Mathematician, I may have in fact been able to decide whether the comment was factually correct or not. So it may be feasible to honour such requests (very slim chance of me being the actual perfect mathematician though).
Anyway, this post is part call for discussion, and part call for sanity:
People! Please think before you flag!