Ockham stated that it cannot be strictly proved that god, if defined as a being who possesses the qualities of supremacy, perfection, uniqueness, and infinity, exists at all. However, if one intends to identify a first cause of the existence of the world, one may choose to call that “god” even if one does not know the precise nature of the first cause. And even the first cause has its difficulties, since a cause will itself need another cause.

