No I understand. You can dismiss the assertion that Thor is real by being undecided on the issue, which is the only nonfaith based conclusion. The lack of evidence is the whole point. You have exactly as much evidence of thors existence as you do his nonexistance. So if you assert he exists or not then that is faith, if you assert you don't have enough evidence to decide either way then that is science.
Since you claimed you have no reason to believe god doesn't exist, or exist, then you are undecided and thus by definition agnostic.