I'm sorry, but what you are talking about OP is, to be frank, quite inane and silly.
If you had any mathematical training (major, masters or Ph.D. in math, heck even a upper division math course on number theory, or any science background), then you wouldn't even do this. All i can conclude is that you have debate classes training in how to make an issue of something that isn't an issue.
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Here are some assumptions for you:
1. There is a 'true' reality that is independent of human thought, language, etc. I.e.
Whether you call something gravity, chemistry, physics, light, etc. whatever we describe with human language, the universe couldn't careless. The planets will still be "in orbit", the stars will 'twinkle', the sun will still exist.
2. Human language, science, etc. is 'model', theory, words, etc. that help us understand, interact and comprehend the 'true' state of the universe.
There are imaginary numbers and all sorts of fun things out there, and apparently to you, the number zero. In terms of the universe, it couldn't careless what we call it, or how we use it. Our use of zero, imaginary numbers can be 'wrong' or approximations, but it doesn't matter if it helps us and makes things easier and just plain simple.
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You want to debate something? Go debate whether Pluto is a planet or not. That makes more sense than debating whether zero is a number or not. Both "exist" in a sense but hey, maybe it will be like deciding zero should be named pie or cake or whatever else floats your boat.
-C
P.S. zero is a number.