LLMs don't have a magical ability to arbitrate complex truths. If the "low-fat diet" narrative is prominent in the training literature, I would expect the mode

LLMs don't have a magical ability to arbitrate complex truths. If the "low-fat diet" narrative is prominent in the training literature, I would expect the model to say that more often that it said the opposite. I don't ever really use the term "thoroughly debunked" when referring to nutrition science; as you noted, a better term is that the claim is not supported by the evidence. I've seen enough things debunked and then rebunked to know that nutrition science is not really that accurate.