There is more to .. atheism than simple denial of one claim; it's actually based on a scientific attitude that values evidence and reason, that rejects claims resting solely on authority, and that encourages deeper exploration of the world. Atheism is not solely a negative claim about gods, but is based on a whole set of positive values ... That denial of god thing? It's a consequence, not a cause. – PZ Myers
If you have ever used the following arguments in a debate with a believer or engaged in hair-splitting arguments about the frontier between atheism and agnosticism you may be a dictionary atheist, or as Myers puts it, a “dumbass”.
“Atheism means you lack a belief in gods. Nothing more “
“Babies are all atheists”
“Science flies you to the moon. Religion flies you into buildings”
“I just believe in one less god than you do”
Myers had some uncompromising words for this sort of simplistic thinking in his speech to the Atheist Alliance International 2010 Convention in Montreal. Following some harsh criticism for his remarks he decided to up the ante in his blog Pharyngula in which he went as far as to describe atheism as a “movement”, and even an “organisation” with positive goals and values.
Even if you disagree with his opinions - the idea of an organisation made me cringe - you will be challenged to think about your views by his article and by the more than 500 comments that follow.
Here is the original speech that started the furore but for a fuller explanation of his point have a read at the blog entry.