Description : When you see a question here that you know for a fact is answered incorrectly, do you correct the poster?
Last Answer : If you are sure the advice given is incorrect, say so. You can do it in such a way that you aren't demeaning to other posters (and I am quite sure you would be respectful) but the person ... received is wrong (and especially if it is something to do with medicine etc.) you definitely should say.