But that is an error in the truth model, it is still a truth model. Spell checkers often flag correctly spelled words since they are configured wrongly or don't

But that is an error in the truth model, it is still a truth model. Spell checkers often flag correctly spelled words since they are configured wrongly or don't have a large enough dictionary, but they are still spell checkers. Same with human truth models. Humans can evaluate the facts in a text without evaluating the structure, and vice versa. ChatGPT can only evaluate the structure, that indirectly evaluates truth a bit in the text but the main factor when ChatGPT evaluates is whether the text fits in structurally, which includes whether statements align with each other, but the major factor is grammar and other kinds of text structure.