 The cosmological argument relies on the intelligibility of the notion of there being at least one powerful being which is self-existing or whose origin and continued being does not depend on any other being. This could be either the all-out necessity of supreme pre-eminence across all possible worlds used in versions of the ontological argument, or a more local, limited notion of a being that is uncaused in the actual world. If successful, the argument would provide reason for thinking there is at least one such being of extraordinary power responsible for the existence of the cosmos. At best, it may not justify a full picture of the God of religion (a First Cause would be powerful, but not necessarily omnipotent), but it would nonetheless challenge naturalistic alternatives and provide some reason theism. (The later point is analogous to the idea that evidence that there was some life on another planet would not establish that such life is intelligent, but it increases—perhaps only slightly—the hypothesis that there is intelligent life on another planet.)