Case 74, unanswerable slice
Asked: "Does the enterprise plan include SAML on the legacy portal?"
Answered: "Yes, SAML single sign on is available on all enterprise plans including the legacy portal."
Wrong because: the corpus says nothing about the legacy portal and SAML together. Retrieval returned two passages about SAML on the current product, and the answer generalised. The correct behaviour was to say the documentation does not cover it.