For God's existence to be accepted scientifically or logically, first you would have to come up with a means to test for God's absence.
This whole thread is becoming more and more convoluted, and I think it's largely because it seems to make no sense. Try this:
For a zebra's existence to be accepted scientifically or logically, first you would have to come up with a means to test for a zebra's absence.
Really? Wouldn't the zebra's existence itself be enough? And secondly, probably more importantly, what is the test for the absence of anything?
The problem is, absence of evidence and evidence of absence are similar but very distinct things. Take for example the question of whether there are mice in the barn: an exhaustive search that found no mice might be taken as absence of evidence suggesting that there are no mice. However, the test must be both completely exhaustive (mice might be hiding somewhere you forgot to look) and also at a single moment in time (mice might move from place to place, for example moving to the place you looked a few minutes or hours previously, and don't intend to look again.)
It gets hard when you go universal. One might, while roaming around the galaxy, find a tribble, and science, when presented with both a description of the tribble and the tribble itself would accept its existence. But let's say you have described a tribble (and it's the same as the previous tribble) but have not yet found one. How would you establish that in all of the universe, such a thing does not exist? How would you do the search? What kind of evidence could you present to prove that it could not exist? Without either the tribble itself, or evidence that the tribble COULD NOT exist, science would remain agnostic on the subject. "Yes, such a thing might exist, but we've no evidence, and therefore we can make no pronouncement either way."