Actually, I've pointed out that you don't have to believe in the existence of something to be able to understand what is meant by the term, e.g. as with a unicorn.
Backwards, Al, backwards - I, at least, have to understand the term in order to stand any chance of believing it. (Hopalong Casserole has asserted that many scientists have believed in things which they couldn't define and I've asked for examples of this, but so far he has declined to furnish me with any). That doesn't always obtain, needless to say: I know more or less what Atlantis means and I know what a unicorn means and don't believe in the existence of either. But to believe in something - to hold that its existence is a true state of affairs about reality - I need to have some sort of even minimal, meaningful, coherent definition and as Gordon, NS and I have all independently said, this doesn't apply to gods where essentially the concept of "make it up as you go along" seems to be king.
So how have I wandered away from the questions at hand?
Because where I entered the thread was in asking Bashers what sort of methodology he may have in mind for determining the difference between a god that exists but says 'no' in response to some prayers and the non-existence of any gods and the operation of random events. How to ascertain the operation of the one or the other. You chose to attempt to answer on his behalf.
I honestly don't understand why you, Gordon and NS can't understand what the term "God" means. The rest of the world seems to, including the OED people.
You seem to think that everyone else who believes in a god believes the same as you, then. The OED people are clearly relying in an extremely limited, parochial, culturally-bound definition of a Judaeo-Christian monotheistic deity. Which, as it happens, appears to be the one you claim to believe in. Lots of people do - most monotheists in the world, actually. But as I said before, that doesn't make it true or right, just common.