" Caroline merely continued to look omniscient, which so annoyed me that I went on: “Perhaps you will tell me, Caroline, if I have a medical degree or if I have not?” “You have the medical degree, I dare say, James—at least, I mean I know you have. But you’ve no imagination whatever.” “Having endowed you with a treble portion, there was none left over for me,” I said drily. "

― Agatha Christie , The Murder of Roger Ackroyd (Hercule Poirot, #3)