Carly Fiorina received a BA from Stanford in medieval history and philosophy almost 40 years ago, but she’s always ready to revisit her undergraduate glory days. Last Sunday, the Republican presidential candidate tried to burnish her national security credentials by claiming that her bachelor’s degree prepared her to fight Isis. She said: “Finally my degree in medieval history and philosophy has come in handy, because what Isis wants to do is drive us back to the Middle Ages, literally”. I’d like to state unequivocally that my years of training to become a professor of medieval history in no way make...