It's a technical term: Survey of Hallucination in Natural Language Generation (2022): https://arxiv.org/abs/2202.03629 https://arxiv.org/abs/2202.03629 From

It's a technical term: Survey of Hallucination in Natural Language Generation (2022): https://arxiv.org/abs/2202.03629 https://arxiv.org/abs/2202.03629 From source: "Once again, intrinsic hallucination refers to output content that contradicts the source, while extrinsic hallucination refers to output content that the source cannot verify."