 The schema looks as if it is meant to do something more, to connect temporal notions to existence. But if so, how is existence relative to a frame to be understood? Classical presentism, for instance, wishes to identify existence with present existence or existence now. Since the present is relativized to frames in special relativity, may not existence be relativized to frames as well? This is a difficult notion to understand or accept. Kurt Gödel (1949, p. 558) said flatly, “The concept of existence … cannot be relativized without destroying its meaning completely.” Is the concept of existence, then, like the concept of truth, which, when relativized (as true-for-me, true-for-you), comes to something more like belief than truth? Or is it like simultaneity, about which thoughtful persons a century or so ago might have made pronouncements much like Gödel’s? This difficult and fundamental question has by no means been resolved.