What evidence would convince you that god exists?
an inerrant holy book describing the activities of an omnipotent being and not one that was clearly the product of tribal wish-fulfilment.
What evidence would convince you that god exists?
If it would happen, wouldn't other hypotheses be far more probable than a real "god" actually doing it?
Depends on what you consider to be "probable," I guess. I personally don't find advanced sooper sekret alien technology to be that much more probable than magic or miracles.
If it would happen, wouldn't other hypotheses be far more probable than a real "god" actually doing it?
For example, if there is a man who can _really_ turn water into wine, and he says he is god - it is more reasonable that he has paranormal powers, but isn't a god, than he really is "god".
What evidence would convince you that god exists?
Advanced technology is a rational explanation. It assumes that there is a causal chain. Magic doesn't involve a causal chain.
Imagine that we are two people living in a primitive culture.
First, one needs to define what a god would be.
As for proof of Gods existence.. how about spontaneous regeneration of an amputees limbs.

There's your problem right there. How can one define something omnipotent, and how can one test it?
Gee, so if every amputees would pray for regenerations of their limbs, and their prayers would be fulfilled, your hypothesis would be that there really is a god answering them?
I would start looking for neurological explanations.
But even taking your amazingly bad analogy at face value, it can be easily demonstrated that the English explorer is not a God. Take his rifle away, for example, and he can no longer kill at a distance. He also can't restore what he killed. An omnipotent God has no such limitations.
Only this man can operate his rifle (the others don't know how to use it).
He wouldn't be omnipotent, but he would still have supernatural powers.
Are we talking about god or God?Not relevant.
Then he's not God.