For years, I’ve been teaching a fake graph. In pretty much every course I teach, on some day when students seem discouraged or distracted, I’ll draw an X axis labeled “Experience” and a Y-axis labeled “Confidence,” and sketch out the “Dunning-Kruger Effect” curve, as preparation for an informal pep talk, which goes something like this: When learning anything new, beginners tend to learn so much when they are first exposed…