It all comes down to the nature of the claim. Theists purposefully make their claim completely unfalsifiable, and they will not make any claim that can possibly be tested. In my experience people make their claim more testable, the more confident their belief in it. This is why I think that deep down Theists have major doubts in their beliefs (though actually this is something that cannot itself be tested which is why I wouldn't say this with any degree of certainty).
I'm not sure you can 100% say there is no God, however I would happily bet my house on a God not existing.
I'm not sure you can 100% say there is no God, however I would happily bet my house on a God not existing.
