"That which can be claimed without evidence can be dismissed without evidence."
Accordingly, consider your fatuous claims dismissed.
Believe it or not, you can start questioning your claims of an absolute, incontrovertible truth. It's all up to you. I admit it's not an easy path but it's possible because many before you have succeeded.
Yes, deal old Carl makes a fair point...as far as it goes. I call myself an atheist, but I never make the claim "there is no god." I call myself atheist because agnostic is just too weak for where I stand on the matter. While I don't claim dogmatically there is no god, I also very, very strongly doubt the existence of any such thing.
Where I say "as far as it goes" about Sagan's point, I mean by that only that when somebody actually tells me what they consider to be factual statements about their god -- what it wants, what it can do, what it knows, how it works, and so on -- then it generally becomes fairly trivial to show the contradictions in light of the real world in which we live, and which is said to have been created by and sustained by that god.
Oh, and I'm fully aware that when I run these sorts of arguments by any particular god believer, we pretty much always wind up with the ultimate killer argument: "God works in mysterious ways, so your (my) argument doesn't hold up!"