Is it logical for a Theological Noncognitivist to identify as an atheist?

[robvalue]

You make a good case. However, atheist itself is a pre-emptive stance to any particular God question, and in reality may be incorrect. (I call the sun god!)

So I can say I pre-emptively lack the belief in something that hasn't been described properly to me, with the proviso that I may already believe in it under a different name.

I think to say otherwise is to make atheism itself meaningless, replacing it with "probably/conditionally atheist" or something like that.

You're right, exact meaning is important. What I was saying is when you're dealing with someone who doesn't understand basic arithmetic, there's not much point explaining the finer details of infinite geometric progressions.