I'm not sure this is a useful test. You can most certainly get an LLM to infinitely "correct" or "improve" its own output. But take the "The work uses graphs..." paragraph and plop it into an AI text detector like Quillbot. It's a long and non-generic snippet of text, and it will score 100% AI. This is not something that happens with human writing. Sometimes, you get false positives on short and generic text, sometimes you get ambiguous results... but in this case, the press release is AI.