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"It is not too much of a stretch to conclude that a system that is better at telling factual from non-factual sentences is better at not making them up in the first place – or alternatively could decide through a two stage process if it was being inconsistent."

Stretching aside, how does one follow from the other?

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If the system can evaluate the truthfulness of a statement, and it can generate statements, then it can create arbitrary numbers of candidate statements and filter for truthfulness.

Looks like you take the "alternatively" fork in the original statemet - is it not a tautology?

[Author] This is what I meant. That even if it doesn't work at a single layer, you could build a "verifier" stage whose approach is similar to this verification process and it can make the decision.

They don't.

[Author] The problem is: how could you objectively evaluate the factuality in any other way? Summary ranking is an established approach in the literature.

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