Ok then. We agree that there are many types of atheists.<quoted text>
Well, then, that is part of *my* belief system. I base my truth claims on evidence when dealing with the real world (and axiom systems when dealing with math and logic). The claim that there is an intelligence that is responsible for the universe is a very large claim and would require a great deal more evidence than anything ever presented by religious believers. I have found that most religious people think that simply pointing around them constitutes evidence for such an intelligence without really realizing the types of evidence required to prove their proposition. For one: complexity is definitely not enough.
But what you fail to grasp is that there is no single collection of beliefs that all atheists hold except for the simply *lack* of belief in deities. Some (probably most) are atheists because of reasoning similar to mine (i.e, lack of convincing evidence for a deity), some are atheists because of rebellion (a very poor reason, in my view), some are atheists and believe in an afterlife. Some are atheist and do not (I, for one, do not).
The point is that being an atheist simply means you lack a belief in any deity. How you came to lack such belief, whether through positive or negative causes, is irrelevant to the basic definition.
Now, atheists will tend to not believe the Bible is completely accurate since it mentions a deity. For the same reason, they will tend to not consider the Iliad completely accurate. In neither case do they consider the writings as sufficient reason to believe everything written.
Well, at least it is a claim that can be tested. Shall we survey those who have believed in a religion then decided it was wrong and find out whether they find themselves happier before or after?
There are also many types of Christians.
All of which have beliefs.
Your idea of a study would be too biased to be considered. Most atheists that used to be religious have a chip on their shoulder & would lie to make the stats seem higher.....