I totally appreciate your honesty. I think you're the first (or at least one of few) atheists here that will admit to having beliefs.<quoted text>
It would alter my belief system substantially. Given that I'm an atheist, I'd say that evidence that Adam and Eve existed - say we found Eden - would threaten my belief system, absolutely. But so what? I'd have to change. If my beliefs are incompatible with the universe, then I am no longer capable of producing accurate science - I'd have to search for different answers.
At the point where a creator-deity was discovered, I'd have to dramatically realign my non-created view of the universe and biology to a created one. Currently, that doesn't make any sense whatsoever, so the reality of that would suggest the Creator is deceptive and enjoys scientists doing the wrong thing. Or that the Creator is not all-powerful and a trickster/liar deity co-exists with It.
That's sort of like me asking you "So, if the Mayan gods turned out to exist, and your deity was some kind of devil or something, would that change your belief system?"
The answer can only be "yes" followed by "uh, that would be awkward."
You have RR's respect.
You want lettuce on that sammich?