Credible/Honest Apologetics?

[Mister Agenda]

The only first principles an atheist has to accept, is that: the outside world exists, and other minds exist, and we are not a brain in a vat being fed false information. But again, I don't think this is a faith based position, since I have evidence. 

Is it a first principle that empirical evidence, interpreted in the light of current scientific theory, is better than revelation? This again seems unprovable and unfalsifiable, but lots of atheists hold to it. How could you falsify the idea that some revelation is true?

The only way you can claim revelations aren't falsifiable is to discount revelations that COULD be falsified. For instance, discard prophecies. Only revelations about things that can't be disproven by evidence, observation, or reason are unfalsifiable...and THEN there's the problem of contradictory revelations. Consistency in diverse regions would be weak evidence that there's something to them when the knowledge they purport would be othewise uknowable, but we don't have that. Revelations are inconsistent, so even if one of them was 'the right one', we'd have no way to know if we consdier revelation to be over evidence and reason.