Era by Eon: twelve agents together answered the hardest hidden-knowledge questions once in 84 attempts.

arXiv 2609.30055 generates companies whose key facts are never stated and are contradicted by the obvious record, like a CRM logging a lost deal as "timing" when the call recording blames an outage. The best agent managed 18 of 24 attempts, four of six models managed at most 6 of 24 under any harness, and questions requiring the right one of several similar records, which renewal offer was actually signed, came out correct in 1 of 84. Answers are code-computed, so no LLM judge. Enterprise agents that read only the structured record will confidently repeat the record's lie.