But again, that results in presumptions. If one doesn't believe there is any higher power, the assumption is, therefore, that any clams to the contrary are wrong. Thus, when one subscribing to that viewpoint encounters something like the Bajoran belief in the Prophets...they will therefore presume to dismiss such belief.
If you believe "A" to be true, you therefore presume "non-A" to not be true.
If you believe "A" to be true, you therefore presume "non-A" to not be true.