: It is a common claim in contemporary philosophy that there are certain predicates which, though they are in fact empty have null extension have it Given a chance to add a footnote, I shall mention that Rogers Albritton, Charles Chastain, Keith Donnellan, and Michael Slote (in addition to philosophers mentioned in the text, especially Hilary Putnam), have independently expressed views with points of contact with various aspects of what I say here.