So you are assuming they are human because it hasn't been explicitly stated what they are ? This is fallacious.
If it has not been specifically stated Ururu or Jinta are human this is mere guess and speculation. No way getting around that unless you ignore logic.
Don't suppose you'd mind telling us what a less speculative answer would be? I suppose they could be Bount/Arrancar hybrids, after all, nothing says they aren't and apparently that's all we need these days.
To be fair, Xil, while I understand your reasoning, I do think it's a bit much to say with certainty that they are human. Their spiritual power, strength, and Ururu's "Slaughter Mode" seem to suggest there's more to them. Plus the EU outright says they're artificial beings like Nemu.
So, might I suggest we just put their species as "unknown" for now?
