As Mark Cheney writes on Big Think, the criteria:
Richard Dawkins’ Belief Scale Scoring Rubric
1. Strong Theist: I do not question the existence of God, I KNOW he exists.
2. De-facto Theist: I cannot know for certain but I strongly believe in God and I live my life on the assumption that he is there.
3. Weak Theist: I am very uncertain, but I am inclined to believe in God.
4. Pure Agnostic: God’s existence and non-existence are exactly equiprobable.
5. Weak Atheist: I do not know whether God exists but I’m inclined to be skeptical.
6. De-facto Atheist: I cannot know for certain but I think God is very improbable and I live my life under the assumption that he is not there.
7. Strong Atheist: I am 100% sure that there is no God.
Do you believe in God? Sometimes this question warrants more than just a yes or no answer. To categorize one’s own beliefs about the possibility of the existence of a deity, Dawkins proposed a “spectrum of probabilities” in his book The God Delusion.