If I ask it what color an orange it and it says blue, that would be wrong.
If you ask it a question and it makes up a completely fabricated story, like for example the case files in that recent legal case [1], then saying it was “wrong” doesn’t really seem to capture it.
Calling it a hallucination is a great analogy, because the model made up a plausible sounding, but completely fabricated story. It saw things that were never real.
[1] https://apnews.com/article/artificial-intelligence-chatgpt-c...