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The Stanford Philosophical Encyclopedia which you erroneously defined as a dictionary (which it is not)
Agreed.
Thank you
is not a recognised or accepted lexicographic source,
Accepted by whom? You?
Nope by just about anyone around. Firstly because an encyclopaedia is not a dictionary (I trust you understand the difference). And actually Stanford Philosophical Encyclopedia is really a collection of articles, not really an encyclopaedia as we really understand them. So it isn't even a non reputable lexicographic source, it isn't a lexicographic source at all.
unlike the leading dictionaries I quote. They can say what they like, their definition is not an accepted lexicographic definition unlike the reputable dictionaries.
So unless or until you actually come up with evidence that a reputable dictionary actually uses deny (or its derivatives) in a definition of atheism I suggest you accept that you are wrong. Sure there is a range of definitions, but deny it not part of that range.
Yes, use two of the ones you quoted!
FFS Alien - where in any of the definitions in (arguably) the four most reputable lexicographic sources in the world is deny, denial or denier contained in the definition of atheism. It isn't. Are you incapable of understanding this.
So pick out deny, denial or denier in:
Oxford:
Disbelief or lack of belief in the existence of God or gods.
Collins:
rejection of belief in God or gods
Chambers:
the belief that there is no god.
Mirriam Webster
a : a disbelief in the existence of deity
b : the doctrine that there is no deity
It isn't there - or can't you read!!