Been examining the great waterfall. It is the finest thing on the estate, I think. The new creature calls it Niagara Falls—why, I am sure I do not know. Says it looks like Niagara Falls. . . . The new creature names everything that comes along, before I can get in a protest. And always that same pretext is offered—it looks like the thing.
—Extracts from Adam's Diary, The Private Life of Adam and Eve (1)
Classifications of clinical disease are at first crude, then, as knowledge accumulates, they are refined and made more useful. The categories become less