It’s not a human, and we shouldn’t assume it will have traits we do without evidence.
Iteration also is when your brain meets the external world and corrects. This is a closed system.
We are not assuming that. The iteration happens by taking the report and passing it to another reviewer who reviews the first review. Their comparison is between a human reviewer passing reports to a human reviewer vs. CriticGPT -> human reviewer vs. CriticGPT+human reviewer -> human reviewer.