of God's existence are so non-specific that it is certain that something exists that meets the definition[citation needed]; in stark contrast, there are suggestions that other definitions are self-contradictory. A wide variety of arguments exist which can be categorized as metaphysical, logical, empirical, or subjective. The existence of God is subject to lively debate both in philosophy[1]—the philosophy of religion being almost entirely devoted to the question—and in popular culture. Atheists maintain that arguments for the existence of God show insufficient reason to believe. Certain theists acknowledge that belief in the existence of God may not be amenable to demonstration or refutation, but rests on faith alone. Other religions, such as some sects of Buddhism, do not concern themselves with the question of the existence or non-existence of God at all. Psychological and sociological explanations for believing in the existence of God may point to a shared neurological and cultural framework for belief based on cognitive processes in the brain. ]