Christ's birthday

[Tiberius]

But everything that exits could, in theory, have a test that would prove/disprove its existence. even if we don't know how to do it now, we can't discount that in the future some sort of test would be a possibility.

So all we need is some aspect of gods influence on the 'real' world and test that.

If there is no such thing what the hell use is he?

Correction, everything that exists as matter/energy in theory has a test that can prove/disprove its existence. The philosophy of materialism is what science clings to (for good reason), and it states that all that exists is matter or energy. The only problem with materialism is that you can't prove it, thus it is an assumption that science works with.

God cannot be said to exist as matter or energy, indeed if God is non-temporal then it doesn't exist as either of these, but as something else. Thus a simple test to demonstrate its existence is not feasible. One argument against this is that if God acted on the universe to change things (as many believers hold it does), then it should leave evidence behind of these changes that contradict scientific observation. Of course, the massive problem with this is that if God can be said to move freely outside the confines of time and space, then it is perfectly reasonable to assume that God can change things in such a way as to hide the fact that it changed things. The other problem is that there is nothing to say that God doesn't simply use natural and scientifically observable processes to act upon the universe in the first place.

God is ultimately unprovable either way.