I remember years ago when I had just finished a difficult final exam for a 2nd year engineering course. I was in a group of students discussing our possible grades. One very likable guy stated he was a bit concerned about his exam grade because the prof had often said this particular course was used to separate future grads from dropouts. This likable fellow added to the conversations that he wasn’t really worried because if he flunked he would just go back to Kentucky, I think it was, and become a preacher.