There is no god or gods!

[Darkstar]

I recognize that my personal certainty doesn't equate to knowledge (or "absolute proof", in your words).

So we are basically in agreement. Although I cannot prove absolutely that god does not exist (as he has been labeled as 'unknowable' by his inventors) I am personally certain that he does not. If the definition of strong atheist is someone who has proved god's non-existence, then such a term is useless. I take strong atheist to mean someone who is personally certain that there is no god, and weak atheist to mean someone who doesn't believe in god, but still has at least some doubt of his non-existenece.