@ghost-of-a-duke said
'Knowledge' of something isn't a 'belief' of something. Perhaps that is where you are going wrong sir?
Putting God back on the table, I have 'knowledge' about the God figure a Christian has 'belief' in. I've studied the evidence and found it wanting. I am detached from such a belief.
Well, to know something you have to have a belief. So you have at least two beliefs about Father Christmas, one that he wears a red coat and the other that he doesn't exist, at least in the literal sense.
I've been thinking about this recently so I'll write it in symbolic logic. Suppose we use G to denote the proposition "God exists" (and P to be any proposition). ¬G is then "God does not exist". An agent's state of belief about some proposition is B(x, P) meaning agent x believes proposition P. B(...) is a modal operator. Since we're always talking about the beliefs of a particular individual I'll abbreviate this to B(P).
So for one of the Christians we have B(G).
For an atheist we have ¬B(G) and B(¬G).
For an agnostic we have ¬B(G) and ¬B(¬G).
The issue is that ¬B(P) is different from B(¬P). The former simply states the absence of a belief in proposition P, whereas the latter makes a more definite statement that the relevant agent believes the proposition is not true. They are not the same logically because one cannot move a negation through a modal operator without some axiom to allow it.
For someone's beliefs to be consistent one needs: if B(¬P) then ¬B(P). But the converse would do some damage to a description of belief using modal logic. Suppose I asked you if you believed whichever the most recently discovered Earth-like exoplanet found to be in the region about its star where liquid water can exist harbours life? I'm imagining that you'd say something along the lines of "I don't see why not, but how should I know?", there's no reason for you to believe there is life there and there's no reason for you to believe life is not there so you don't have any particular belief about that particular proposition.
However, you have stated that you are an atheist: B(ghost, ¬G). Which means you have a belief about God. As an agnostic I could consistently claim I do not have a belief that because all I say is ¬B(DT, G)&¬B(DT, ¬G).
As to my wider point, once acquainted with the notion of a God we tend to develop ideas about what such a being would be like and so I don't think it's really possible to claim not to have any beliefs about God.