Have you ever found yourself arguing with someone who clearly is in over their head, but just can't see it? Or have you ever realized that you're not nearly as skilled at something as you once thought you were? There's something to explain this phenomenon: the Dunning-Kruger Effect . It explains how someone can read a single article and then profess to know everything there is to know about the American health care system. Or how someone who is a truly awful singer can go before the American