What is an atheist?

[Whateverist]

You can think can't you?

Surely that is existence right there?

Yes, but not necessarily the existence of the "I".

There are many critics of Descartes who have pointed out that even his cogito ergo sum wasn't necessarily true.

I should say "I knew that" but I was just going for the gag.

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I believe you are not defining the term 'agnostic' correctly

I understand that , i just see it as irrelevant addition . If you are an atheist then of coarse the existance of gods is unknown and unknowable .

You're missing a distinction here, though it may not apply for you. I'm primarily an agnostic and a defacto atheist. The lack of knowledge (to the point of not really knowing what would even count as a god) is what I am most certain of.

Do I consider it likely that any gods exist? Not at all. I'd be very surprised. But do I have any strident belief that gods do not exist? Of course not, no more than I have any beliefs regarding any other nonsensical or poorly defined 'thing'. It just isn't worth getting worked up over. Cross that bridge if we come to it.