Agnosticism

[Marquetta]

Not knowing or admittedly not being capable of proving or disproving the existence of a superior being or beings.
Either used to show a person as [sitting on the fence] or somebody who is certain that the existence of a supernatural being cant be proven or disproven.
Agnosticism is merely the [ism] for [Agnostic].

[Zipporah Schumaker]

the beliefs of someone who does not know, or believes that it is impossible to know, if a god exists: