What counts as evidence for/against God? [View all]

The old back and forth: There is no evidence! There is evidence! Evidence doesn't matter because belief does not depend on evidence! You are supposed to show evidence that he exists! No, you are supposed to show evidence that he doesn't exist!

What kind of evidence are we even talking about?
Witness-testimony?
A subjective sentient observer making a repeatable measurement on an object?

What would a piece of evidence for God's existence even look like?
What would a piece of evidence against God's existence even look like?
What would be good enough?

And let's say, there is a massive miracle that cannot in any way be explained by science and too many credible witnesses to discard it, how can we be sure that God did it? What if it was Satan? Or aliens? Or a hallucination?





Let me guess: "We will just know."
Okay, that means, as long as there's one guy who doesn't know, it doesn't count, because if it were the real deal, he would know.