Abstract

ARTHUR PRIOR BEQUEATHED US the perceptive advice that "it is always a useful exercise, when told that something was possible, that is, could have happened, to ask 'When was it possible?' 'When could it have happened?'" Illustrating his point by considering whether it was possible for God to have "launched Julius Caesar into being, or arranged his coming into being, at a different time and under different circumstances," Prior's reply was "I doubt it." What God certainly could have done was to launch into being some man with precisely those properties that Caesar did subsequently have; but what He could not have done, says Prior, was to "launch Caesar" or "create Caesar" in any sense "in which, He having said 'Let there be a man, with properties X to Z,' and there then starting to be a man with those properties, one could intelligibly ask 'But was this the man you wanted?' or intelligibly say 'This--and no other--was the man God intended.'"