If there's no evidence to authenticate a claim or testimony, no one can know the Truth of it but the testifier. And if all the witnesses are dead or otherwise unavailable, they can't be cross examined--much to the relief of those who claim revealed certainty. Then there's the question, why wouldn't God, if It was going to reveal something, do it for everyone, everywhere, everytime, in every language so it couldn't be corrupted by fallible humans?
Yes, in court, sometimes we have to decide what is most likely the Truth, but in criminal cases, there can be no reasonable doubt--where as with divine revelation, there's nothing but doubt. Take a will as an example. The deceased-to-be signs it in person, with two witnesses, and it's executed by a person of his choosing. Now, imagine a person writing something and saying that this is God's will. Not signature or it's in the author's handwriting, all the "witnesses" validate each other even though they're 2000 years dead or 2000 years after-the-fact, some priest says God chose him as the executor. Any judge would throw it out, but in our cases, with revelation, we're the judges.
We do so where there's corroborating evidence, the declarant is credible and trustworthy, but most importantly of all, the situation demands a decision one way or another be made. When you're talking spirituality, you're betting your soul if you have one. Are you going to rely on rationality, or emotion based mostly on a long family tradition founded on 2000 years of what is most likely air and superstition.
Tradition without a foundation in some sort of reason is highly suspect. Why or how did it start? They mustn't be their own justification.
In large part because we rely on our emotions for our reactions. Look at all the godawful, complex moral codes we've come up with. Deuteronomy alone makes my eyes cross. But all we really need is a very simple one sentence code, honor the equal rights of all to life, liberty, property and self-defense.
Like I say, it depends on the source.
Questioning the existence of God, at least a revealed God and It's revelations leads directly to questioning the religions founded on those revelations, with the existence of those revealed Gods being a near certain lie or some form of misinterpretation or indoctrination.
No, the claim is whether a God might or might not have created the universe. Neither position can claim any evidence, at least not at this time. That said, a claim that God revealed Itself or some information, does put the burden of proof on the claimant. A deist God is just as remote as no God.
No. "Does God Exist?" would be a proposition. "God does not exist" is a declaration. And in either case you would need to define what God is. I define God as all that there is, objective and subjective, the whole Truth. It may or may not be conscious. Lies, the inventions of sentient creatures alone, are not part of God (if It exists), since they are the absence of Truth.
Yes, but you can't change that by using slight-of-hand with the dictionary. If one doesn't believe or if one disbelieves in anything, it's the same position. The only qualifier is the degree of certainty with which one claims that he doesn't believe or disbelieves.