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- The doctrine that certainty about first principles or absolute truth is unattainable and that only perceptual phenomena are objects of exact knowledge.
- The belief that there can be no proof either that God exists or that God does not exist.
agnosticism - Cultural Definition
A denial of knowledge about whether there is or is not a God. An agnostic insists that it is impossible to prove that there is no God and impossible to prove that there is one. (Compare atheism.)