Read the excerpt from David Foster Wallace’s Infinite Jest.

It’s clear that this really pretty sincere yellow Dean at left is Admissions. And surely the little aviarian figure at right is Athletics, then, because the facial creases of the shaggy middle Dean are now pursed in a kind of distanced affront, an I’m-eating-something-that-makes-me- really-appreciate-the-presence-of-w hatever-I’m-drinking-along-with-it look that spells professionally Academic reservations.

Why does the narrator most likely refer to the deans by their titles rather than their names?