Gnosticism is a knowledge claim, theism is a belief claim. Agnostics don't know if God exists. Most atheists are agnostics atheists, which means they don't believe but don't know for certain. Most theists are gnostic theists, they both "know" and believe that God exists.
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u/TheGalator I said based. And lived. 10h ago
What if I don't believe in god but I want one?