You still need to define what exactly you're discussing. I've already explained why you need to do that:I disagree.
To me it would be more meaningful to discuss whether Greek or Roman gods exist than to limit the debate to just one of those sets of gods. Proving that Greek gods don't exist wouldn't say anything about Roman gods.
I know that God as he is commonly understood doesn't exist, because his nature is paradoxical. We can keep discussing my definition of God, in which case I still know that he doesn't exist. You can't counter that by ambiguously talking around some unspoken definition that is only known to you, or perhaps not even that.
Or maybe we can discuss that undefined God, in which case something that did something at some point in time totally exists.