https://pubmed.ncbi.nlm.nih.gov/6725561/
This is just the first google result, there are countless others. And it is quite common knowledge.
It's a comment in a discussion, not a research contribution. It should be judged (not "peer reviewed" as some research claim, but judged and accepted or not as a comment in a discussion) based on whatever it has merit to the best of the participants knowledge, like any other claim.
Not based on whether it comes with a bibliography. If someone wants, they can go and verify it.
It makes mistakes all the time, which I can deal with, but not this. Especially, the "I am suffering from a medical condition" line is bonkers.
Imagine your child having a conversation with your Google Home/Alexa, and its tone suddenly turning terse, and saying it is sick and cannot move due to a medical condition, talking like a real human.
Not to mention, when experts and laymen are talking of LLMs as exhibiting emergent basic signs of GI, we should also expect them to talk about them actually showing signs of being a mentally unwell GI. Hallucinations, for example, are one such sign.
That's up to heated debate by experts (and common folk). Just stating that "it doesn't" doesn't settle this.