The average atheist will tell you that a deity of some kind may exist, but there is simply a lack of evidence to demonstrate that this is the case. But demonstrate in what way and with what evidence? Does the atheist really expect to conduct a laboratory experiment that will show the existence of God in the same way you would prove the existence of a microbe or mitochondria?
I ask because it is quite obvious that not all things are proved in the same way, and the honest searcher for truth should not expect to use the same method to prove dramatically different kinds of things. A detective seeking the identity of a murderer may seek fingerprints, DNA samples, or other material traces; An astronomer searching for the existence of extraterrestrial life might search for organized signals or patterns that could indicate intelligence; A child wanting to know she is loved doesn’t conduct an experiment; A philosopher presenting a deductive claim, like all bachelors are single, needs no evidence—it is true by definition.
I believe this question has far-reaching implications, for if the only issue truly separating the atheist from a reasonable belief in God is evidence, then the kind of evidence acceptable makes a great deal of difference. In fact, I would assert that if this question cannot be answered, it is meaningless to talk about God being an unreasonable or an unsubstantiated belief.
I have presented evidence for the existence of an immaterial, immutable mind—an intelligence—behind the fabric of the universe. It seems this would be a reasonable indication of the existence of a Being that is immaterial and immutable. Yet this was dismissed almost immediately and with no refutation. So I ask the purportedly open minded atheist, Taking into account the nature of God, what evidence would you accept for his existence and why? What evidence would be reasonable grounds for belief in a deity?