As a response to question 758 Nicholas D. Smith said, "Even the atheist grants that God is that being than which no greater can be conceived. Hence, even for the atheist, God exists at least in the imagination (indeed, the atheist claims that God exists only in the imagination). But things that exist in reality are greater than things that exist only in the imagination. So, if God existed only in the imagination, then God would not be that being than which no greater can be conceived--for we can conceive a greater being: one that existed in reality as well as in the imagination). Hence, as God is that being than which no greater can be conceived, God must exist in reality." However, in question 26, Mitch Green says, "Many contemporary philosophers infer from the so-called Paradox of the Stone that omnipotence is not a matter of being able to do anything, but only a matter of *being able to do anything it is possible to do*. That observation suggests another possible insight. Consider the Problem of Evil. If God exists, then it might seem puzzling that God should permit the extent and kinds of evil that we can find. Now there are many things to say about this, but one pertinent to God's omnipotence is this: Certain moral virtues seem to require some evil, and in such a way that even God can't have one without the other. Even God, it might be remarked, can't make a world in which there is, for instance, forgiveness in the absence of any wrongdoing. (I can't forgive you unless you've wronged me in some way.) This is not to say that all virtues require evil, but just that some seem to, even if you're God. As it happens, contemporary philosophical theologians like Alvin Plantinga have made much of how God's powers might be surprisingly limited, while remaining omnipotent!" These two beliefs seem to be mutually exclusive. The first response defines God as the greatest of all conceivable beings, while the second response seemingly limits God's conceivable power. If I can imagine a being that can break the so-called Paradox of the Stone, then how would that be reconciled with this obvious loophole in God's omnipotence?