“The best way to get the right answer on the internet is not to ask a question; it's to post the wrong answer."
The concept is named after Ward Cunningham, father of the wiki. According to Steven McGeady, the law's author, Wikipedia may be the most well-known demonstration of this law.
Cunningham's Law can be considered the Internet equivalent of the French saying "prêcher le faux pour savoir le vrai" (preach the falsehood to know the truth).
Anthony Bourdain has a great use of the Cunningham's Law
Q: How do you recommend people find great restaurants in a new place?
A: I always recommend provoking food nerd fury on websites. Say you're going to a new place; go online and find any old reference on Google for a good restaurant. Before you go, post about that restaurant on a local food forum and say that you had the best [region/country's specialty] there. Inevitably, it will spark rage in the locals and they'll tell you where their favorite spot is and how it's so much better. Pretending to be knowledgeable about places you've never been is a great jumping off point. People will tell you how stupid you are. Provoking that kind of fury in a food nerd will introduce a ton of great spots.