Agents that remember past conversations can retrieve the wrong fact when names are alike, details change, or a question has no supported answer. Finding a relevant note is not the same as knowing what to say.
DISCERN keeps a history of observations that never deletes earlier entries, then builds linked records of entities, events, and facts with their times and sources. When answering, the agent navigates these records and must choose to answer, update, ask for clarification, or abstain, meaning decline to answer.
DISCERN scored 0.861 for answer correctness, versus 0.806 for the strongest comparison system, and was better at declining unsupported questions. This suggests memory systems should preserve the history first, then resolve conflicts and uncertainty when a question arrives.