Then what is it? Semantics do not really matter. Belief or opinion it makes no difference.
Not opinion, knowledge. One believes in things that one does not know to be true. Such as the existence of God.
Irish midgets who look for pots of gold and look up gals skirts.
Very plausible if you ask me unless there is a mythical element of some sort I am forgetting.
But leprechauns like anything else can easily be viewed in a rational way considering their appearance and characteristics.
So you are saying that you believe in their existence?
Would you say that it is illogical to disbelieve in leprechauns? If you would not, why not, and why would it be any different for God?
(...)
But you just stated earlier that belief is incorrect. You are falling back on semantics.
No, he did not, and incidentally, semantics deal with the meaning of words, therefore semantic objections are quite proper here.
Anyway, an atheist is someone who does not believe in the existence of god. No more, no less.
Why you treat that as meaning "... does know god not to exist" I can't tell, but that is something quite different and far less reasonable than actual Atheism.