Except it's not the one you have believed in all your life, or one who you've denied the existence of in favor of facts and science. It's there, it's shown itself to the world and has given undeniable proof of it being the real deal, and so you're left to wonder...
What exactly do you do now?
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If the evidence really is as definitive as you say, then I'd have no choice but to believe that the god exists. That doesn't mean that I'd believe all of the claims its followers make about it, or that my sense of ethics would change.