[Emu]

That used to be my logic except for the fact that it doesn't really hold up when you use the same logic in a similar situation. For example, if it's a matter of faith to say "I believe God doesn't exist," it's another matter of faith to say "I believe Zeus doesn't exist," or "I believe unicorns don't exist," or whatever you want to substitute. And yet nobody would say that they're agnostic about those things, and it's a perfectly respectable position to say that you don't believe any of those things exist and be "certain" of it.