An assertion without evidence, when dismissed without evidence, can only be dismissed with at most as much certainty as it was asserted with. amirite?

For example, if I have a religion, for which no evidence exists, and I tell you authoritatively that my religion is the truth, it's certainly fair to outright declare that I'm wrong. But if all I tell you without evidence is that maybe my religion is the truth, the only dismissal you can fairly give without evidence is to say that maybe my religion isn't the truth.