The human definition of hallucination has to do with sensory experience, i.e. inputs. Saying that LLMs hallucinate means that we're ascribing them control over their inputs that they simply do not have -- by design.

Or, in other words, if a chatbot really were hallucinating, it would probably start giving unprompted responses.

> Humans can hallucinate, its a deviation from what is observable reality.

What is "observable reality" then, for an LLM? Its training set?