This is one of my favorite Hauerwas stories. Let me say at the outset that I’m pretty sure the university in question was, in fact, Harvard. I might be wrong about that, but it makes no real difference.
So this one time, Stanley Hauerwas was at Harvard to deliver a lecture and, being there early and still need to do some preparations, set out to find the library. Not finding it he stopped a student and proceeded to ask him, “Excuse me, where’s the library at?”
The student, looking incredulously at him responded, “Sir, at Harvard we don’t end our sentences with a preposition.”
Stanley paused for a moment and then rephrased his question in a more grammatically appropriate manner: “Where’s the library at, asshole?”