Is black a color? Or is it the name we give the absence of color? Does it matter? Because I don't see how the label "atheist" matters. I know there's a difference between not believing there is a god and believing there is no god. There is such a thing as "pretty sure" that differs from "sure enough to proselytize." I don't see why someone else should get to attach a label they wear to a position that is not in all respects identical to their own.