 So what more is required beyond a logically consistent story of a certain sort? One answer that is suggested by some discussions is that the story needs to be one that is true for all we know.  Thus Peter van Inwagen, throughout his book The Problem of Evil, frequently claims that various propositions are “true for all we know,” and in the “Detailed Contents” section at the beginning of his book, he offers the following characterization of the idea of a defense: