I read all the discussion above  from what i see Unomi argues that atheism is a belief system based on sources ofc however categorizing for example chemistry as a belief system implies that whatever results we obtain from experiments are biased  since the basis of chemistry would be belief not reason Thus it should be discussed is atheism a belief system   are atheists a class of dogmatic people that regardless of experiments and proof to contrary  or lack of proof  still believe that deities do not exist or is atheism a philosophical theory that states that deities do not exist for following Reasons insert reasons here