I believe the choice to use numbers was appropriate, as he was using them to express what IS and what is NOT.
What is being possitive, what is not being negitive.
The immediate conceptual problems are also easy to fix by reading the explination.
There’s a difference between negating by nothing (0) and a negative number (-x) that isn’t accurately portrayed by Coca’s example. But again, this is just describing concepts in term of mathematical concepts, which seems to deride the points he’s trying to make, from my perspective.
I don’t believe he was really trying to use mathmatical concepts so much as create a diagram that could be understood. He used numbers to describe that which is possible in life and impossible in life, and that which is not part of either. 0 is neither a positive or negative number, just as death is neither possible in life or impossible in life.
Maytacera is saying it in better ways I don’t see anyone refuting him 
Maytacera is a her.
Gosh, I might as well just put my vagina as my avatar or something.
Oh, I screwed up this whole post. Did we lose the delete button? Mod please? sorry.