Strong agnosticism

Strong agnosticism or positive agnosticism is the belief that it is impossible for humans to know whether or not any God or gods exist.

Strong agnosticism is in contrast to weak agnosticism, in which the agnostic believes that the existence of any gods is simply unknown, but is not necessarily unknowable. Neither type of agnosticism is irreconcilable with theism (belief in a deity or deities), but both are typically irreconcilable with strong atheism. Weak agnosticism often overlaps with, and is often confused with, weak atheism, as both are a lack of belief rather than a belief in lack (of either existence or knowledge).