If the theory that they trained it on reddit is true, then well there's hardly a shortage of posts where literally all answers are deliberately wrong to troll the poster. It's more statistically likely than one might think.
"Pee is stored in the balls." from reddit comes to mind.
You don't even need to go to reddit; any work of literature that has a villain that behaves in a misleading way towards their enemy (e.g. by giving incorrect information) would suffice here IMO.
Even if it was trained on Reddit it still involves humans to rank the AI responses.