I think there may be a poll on this in this thread, ahem…I encourage all atheists to voice their views accordingly, and they can then cite both their own view and that of the poll. Though of course the views of atheists on this site need not be taken as a binding general rule, it nonetheless would help negate definitions of atheism being offered that few or none on here actually hold.
As @CyberLN says, why not ask, and then accept what someone tells you they believe or do not believe. As a corollary there are over 45k differing sects and denominations globally defined broadly as Christian, how would Christian posters feel if their assertion to be a Christian were dismissed arbitrarily because we decided only one of those applied.