Atheism is the decision by
any person for
any reason to decide that there is no God.
Sanity, education and logic do not enter the equation at this point. Atheism in itself suffers from a lot of illogical conclusions... the same illogical conclusions that Theism does.
As an Example, the Fallacy of the illicit negative, confirmation bias, Choice supportive bias and the entrenchment effect.
This does not mean that all Atheists or Theists are wrong but I've met very few who can give a well reasoned argument without falling into the various logical, cognitive or augmentative bias's which tend to skew our views.
Ergo, Atheists and Theist fall into the same logical traps to support their beliefs and somehow believe each other to be fundamentally wrong when committing the same fallacy's.

The primary logical fallacy that both sides suffer from is the Black/White Fallacy.
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