athiests...

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STRONG atheism is not a "belief" or "faith", but rather a LACK of belief or faith due to a lack of empirical evidence.

Fixt. This is the kinda thing I'm talking about - not all atheists are the same kind of atheist.

Secondly, it is not the job of the non-believer to disprove your claims (or those of your faith). The burden of proof is always on the person making the positive claim, as you cannot prove a negative.

The burden of proof can be on either, actually. Frankly, if you're making a point, you've got to bring the proof or you're just a jerk.

most people who claim to be agnostic are also atheist.

I'd love to say this is wrong, but I frankly don't know more than a couple agnostics... most of which are theists.

If you do not have a belief in any particular god as outlined in any scriptures, you are atheist by definition, even if you believe there are other forces or "creators" out there. That just makes you a "weak (not derogatory) atheist", or "agnostic atheist", as opposed to someone who claims to know for a fact that there is no god, which would be a "strong" or "gnostic atheist".

You're confusing your terms somewhat (I could also, perhaps, be a tad pedantic in the case that nobody else thinks the distinctions matter). The belief in a superior force is theist. An agnostic theist would believe that there is a higher power, but it is impossible to know what it is; they are not atheist. Therefore, not all weak atheists are agnostic atheists, either.