How is ones perception of nothing not something?

Not only perception of, but no-thing itself, is. Thus your "Define nothing? No thing. Nonexistence." and "Is nothing impossible? Absolutely." directly contradict it. If you want to stay within boundaries of reason, it simply does not add up. Unless you mean that everything is possible, in which case I’m losing sight of why is an attempt to stay with strict logic necessary or even feasible. Or why not directly say it like that, instead of relying on convoluted definitions. Not to mention that it still would not add up or make sense. And of course, there’s still that tiny detail that no-thing and non-existence are not equivalent.