That is "True Atheism 101". A bit like "True Scotsman".
Your true atheist is characterised by epistemic purity. Any opinions regarding deities or the supernatural are formed by rational consideration of evidence.
Of course, regarding persons who claim to be atheists and who apparently generate their opinions on the matter by a kind of actively choosing to believe that evidence for the supernatural is impossible - well true atheists simply ignore folks like that. They are not true atheists and hence true atheists are under no obligation to create a label for them.
Edit: spelling "belief" vs "believe".
Your true atheist is characterised by epistemic purity. Any opinions regarding deities or the supernatural are formed by rational consideration of evidence.
That's not what the word means, neither definitionally nor extensionally. An atheist is merely someone who lacks a belief in deities. Their history as to not acquiring that belief is irrelevant to whether they are an atheist or not.
Someone who rationally considers the evidence (whether or not on the subject of deities) is a rationalist.
This is our monthly thread for collecting these little gems and pearls of wisdom, rationality-related quotes you've seen recently, or had stored in your quotesfile for ages, and which might be handy to link to in one of our discussions.