Agnosticism
Part of speech: noun
Definition: The view that absolute truth or ultimate certainty is unattainable, especially regarding knowledge not based on experience or perceivable phenomena. The view that the existence of God or of all deities is unknown, unknowable, unproven, or unprovable. Doubt, uncertainty, or scepticism regarding the existence of a God or of all deities.
Scepticism
Part of speech: noun
Definition: The practice or philosophy of being a skeptic.