AgnosticismAgnosticism is the view or belief that the existence of God, of the divine or the supernatural is unknown or unknowable. It can be categorized as an indifference or absence of firm beliefs in theistic religions and atheism on that basis. Another definition provided is the view that "human reason is incapable of providing sufficient rational grounds to justify either the belief that God exists or the belief that God does not exist.
SkepticismSkepticism, also spelled scepticism in British English, is a questioning attitude or doubt toward knowledge claims that are seen as mere belief or dogma. For example, if a person is skeptical about claims made by their government about an ongoing war then the person doubts that these claims are accurate. In such cases, skeptics normally recommend not disbelief but suspension of belief, i.e. maintaining a neutral attitude that neither affirms nor denies the claim.
IrreligionIrreligion is the neglect or active rejection of religion and, depending on the definition, a simple absence of religion. Irreligion takes many forms, ranging from the casual and unaware to full-fledged philosophies such as atheism and agnosticism, secular humanism and antitheism. Social scientists tend to define irreligion as a purely naturalist worldview that excludes a belief in anything supernatural. The broadest and loosest definition, serving as an upper limit, is the lack of religious identification, though many non-identifiers express metaphysical and even religious beliefs.
DeismDeism (ˈdiːɪzəm or ˈdeɪ.ɪzəm ; derived from the Latin term deus, meaning "god") is the philosophical position and rationalistic theology that generally rejects revelation as a source of divine knowledge, and asserts that empirical reason and observation of the natural world are exclusively logical, reliable, and sufficient to determine the existence of a Supreme Being as the creator of the universe.