I'm glad you've decided to let me arbitrate this matter. Here is my official misinformation heuristic, three questions to ask oneself before acting: 1) Is this

I'm glad you've decided to let me arbitrate this matter. Here is my official misinformation heuristic, three questions to ask oneself before acting: 1) Is this misinformation likely to convince and harm a great number of people? 2) Could belief in this misinformation result in severe health or emotional damage, for a single person or more who believe it? 3) If yes to either, are you an expert on the issue, relative to the person or group making the claim? If you're indeed an expert, try to save the person or people from their downfall. If you're not an expert, read up on the issue before meddling. God forbid it's you who is wrong. And, of course, if no significant harm is likely, ignore it.