HOW COULD I HAVE BEEN SO BLIND? Reader BHW correctly points out that "Waterworld" is not, as a definitional matter, "antediluvian". (He also points out that it's not spelled "antideluvian".) The correct term, I suppose, would be "postdiluvian". Or perhaps just "diluvian". Anyway, I should think twice in the future before throwing around five-dollar words.