There is the possibility that these are hallucinations but the method itself is quite interesting and the output looks legit.
Here are the obtained prompts[2] and his write up about how he achieved this [3]
[1] https://twitter.com/gopejavi
[2] https://github.com/gopejavi/AI-bugs/blob/main/bing/InstructionsReconstruction/2023-04-15-bingInstructions.md
[3] https://github.com/gopejavi/AI-bugs/blob/main/bing/InstructionsReconstruction/GettingTheInstructions.md