[belorn]

Looking it from that perspective, aren't we just describing agnosticism? The lack of "what isn't there" does indeed distinguish it between atheism, as that would be a "I don't believe in X", but it is also distinguishable from the religious beliefs of a true believer.

There is also the possible half point between atheism and agnosticism, where people self identify as atheism but will act according to some religious concept because they view it as important to their lives. To me it indicate strongly that beliefs, any beliefs, sits along a spectrum. A person can live their life in a way consistent with believing in something, either because they believe in it, or they don't know, or that they don't believe in it but still behave in that way because of a reason or an other.