 Although Hartshorne rejected Aristotle’s view on future contingents, his solution to the problem that Aristotle tried to solve neatly parallels Aristotle’s square. “Z will occur” and “Z will not occur” are contraries—they may both be false but they cannot both be true. The contradictory of “Z will occur” is “Z may not occur”; similarly, the contradictory of “Z will not occur” is “Z may occur.” In A Christmas Carol, Scrooge presupposes this schema when he asks the Ghost of Christmas Yet to Come, “Are these the shadows of the things that Will be or the shadows of things that May be, only?” Of this example, Hartshorne said, “There is a master of language [i.e. Dickens]. Will and May are nicely distinguished in ordinary speech” (Hartshorne &amp; Viney 2001, 39).