The same viaduct helper cites the detour flyer but then adds a closed-hours fact that is not in any retrieved chunk. Which score should catch that?
Select an answer to reveal the explanation.
Short Explanation
Think of citing the detour flyer, then adding closed hours that are not in any chunk. Faithfulness or groundedness should catch that extra fact. Fluency and citing the flyer do not prove every claim.
Full Explanation
Faithfulness means claims are supported by the retrieved evidence. Adding closed hours that are not in any chunk fails that score. Fluency, retrieval relevance alone, and a public benchmark do not catch the extra fact.