Though I have fired a few shots across the bows of some of my critics, notably the late Professor Lon Fuller and Professor R[onald] M[yles] Dworkin, I have hitherto made no general comprehensive reply to any of them; I have preferred to watch and learn from a most instructive running debate in which some of the critics have differed from others as much as they have differed from me.

Elephants and manatees are unusual among mammals because they are polyphyodonts. Most mammals are diphyodonts, replacing their teeth only once in their lives.

This is true in the general right of marriage, but not in the chance-medley of every particular match.

Spirit of Kant! have we not had enough / To make Religion sad, and sour, and snubbish, / But Saints Zoological must cant their stuff, / As vessels cant their ballast — rattling rubbish!