Strong Theist: I do not question the existence of God, I KNOW he exists.
De-facto Theist: I can't know for sure but I believe and I live on the assumption that he's there.
Weak Theist: I am very uncertain, but I am inclined to believe in God.
Pure Agnostic: God’s existence and non-existence are exactly equiprobable.
Weak Atheist: I do not know whether God exists but I’m inclined to be skeptical.
De-facto Atheist: I can't know for sure but it's very improbable and I live under that assumption.
Strong Atheist: I am 100% sure that there is no God.