You've gotta keep in mind, the responses to prompts like this depend a lot on the temperature the model is being sampled under, precise phrasing of the prompt,

You've gotta keep in mind, the responses to prompts like this depend a lot on the temperature the model is being sampled under, precise phrasing of the prompt, and random chance. He was fired for being a stochastic parrot, or Sustkever hallucinated one or both stories, or maybe both. We'll never really know unless a certified prompt engineer takes charge of the inquest.