Heads I Lose, Tails You Win
What does it take to convince an atheist that God exists? This question has been asked and answered again and again. But no matter what reasonable response an atheist gives, it is automatically rejected by the religionists. If an atheist suggests that some supernatural event would be convincing to him, that suggestion will be met with one of two possible responses from the religionist: either "That's unreasonable because you're asking to see something that is never going to happen" or "You wouldn't really accept that as being convincing because your own belief system doesn't allow it as a possibility". The religionist will never simply take the atheist's answer at face value, because that would be tantamount to admitting that the atheist is being reasonable. That's something religionists will never admit, regardless of how reasonable the atheist's position might actually be.