That's not related to my rough definition of atheism though. People are atheists if they think there is no God. A person can think a proposition is true, false, or not have an opinion. If true or false, there is a mutually exclusive scale of confidence (or doubt) that applies, from inkling to beyond a shadow of a doubt.
Belief in something is equivalent to having a sufficiently high degree of confidence in either truth or falsehood. You could say it's the maximum degree of confidence, as long as you separate confidence from knowledge -- that is if you allow a person to claim that they are sure of something and at the same time claim that they do not know that thing to be true.
Sure it does. You identify as a weak atheist, I identify as a strong atheist. Our views are mostly the same, except with regard to epistemology and it's semantics.
Most agnostics are like Drool4Res-pect, on the fence. What added clarity do you seek to gain by calling Drool4Res-pect an atheist?
This is answered in parts above.
EDIT:changed "certainty" to "confidence"