As much as you know it’s a horrible idea to believe everything you hear, sometimes you really can’t help it. I mean, what are you supposed to do when you hear from 20 different people on 20 different occasions that shaving thickens hair, that caffeine makes you dehydrated, and that alcohol kills brain cells?

And, more importantly, what are you supposed to do once you find out that everything mentioned above—and other all-too-familiar sayings—are nothing but lies? (Yes, we’re also celebrating the fact that alcohol doesn’t actually kill brain cells.)

Give yourself a pat on the back, because you’ve found the right place (or at least the right infographic) to answer your questions. In his most recent book Knowledge Is Beautiful (U.S. and U.K. editions available), David McCandless dispels the world’s most contagious falsehoods. Whether your Thanksgiving guests are into science, religion, food, or sports, we’re sure that you’ll blow their minds by sharing McCandless’ findings at the dinner table.

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Infographic courtesy of Information Is Beautiful. Photo of true false courtesy of Shutterstock.