Natural and Deductive Theology

Philosophers investigate two broad kinds of religious knowledge claims:

First, natural theology is the attempt to prove the existence of God, and sometimes human immortality, from premisses provided by observation of the ordinary course of nature. Natural theology usually involves posteriori proofs.

Second, deductive theology involves the attempt to prove the existence of God from premisses known to be true by reason alone; that is the reasoning is done independently of sensory experience and is called priori reasoning.