> I assure you, I'm not undecided about the existence of Thor et al.
If you are in no way undecided, presumably that you have determined therefore that Thor (and any god) does not exist, there is nothing wrong with that stance. It just happens to be a faith based position requiring the same amount of faith as any religion. That said, I'd agree you are, in fact, an atheist then.
> It is not my job to refute an assertion;
No one asked you to refute it.
> it's the job of the claimant to provide evidence,
Absolutely, that is not in question. The question is, when evidence is lacking to prove the lack of existence, or existence, of a thing (in this case god) do you take a faith based position and assume that means god does not exist, or do you take an evidence based approach and claim you do not have enough information to determine if god exists or not. Not being able to prove a thing exists is not proof it doesnt exist, thats the whole point.
> There is no credible evidence of deities;
Correct, that is my whole point, just as there is no credible evidence of the lack of deties. The whole point here is there is no evidence for either state.
> therefore, I live my life with No God/ess beliefs.
Also not what is in question. Both an agnostic atheist and a non-agnostic atheist will have this stance. The question is if you are an agnostic atheist (an evidence based approach that does not claim gods dont exist, nor do they claim they do, you simply dont have enough information to decide) or a non-agnostic atheist (a faith based position where despite a lack of evidence showing the non-existence of deities you take the faith based position that there are no deities).
> The literal definition of atheist.
As I said before the definition of the actual word is not the important part to me. There are two definitions of atheist, one that includes agnostics and one that doesnt. There is little doubt your one of these two types of atheist based on your answers, the question is simply if your an agnostic atheist (evidence based) or a non-agnostic atheist (faith based).