Once again, I owe a hat tip to Stoney deGeyter for discussing this point. In his article, though, he draws indirectly on a philosophy dating back to Hippocrates. Back in those days, and for a long time afterwards, doctors believed that both illness and one’s personality stemmed from four humors, and treatment aimed to balance these humors. While science discredited the medical part of this theory, it turns out the idea of four different basic personalities has some merit. To be honest, we’re all a little too complicated to be easily broken down into one of four categories. But in trying to b…