How often do Answers Change? Estimating Recency Requirements in Question Answering

ArXi:2603.16544v1 Announce Type: new Large language models (LLMs) often rely on outdated knowledge when answering time-sensitive questions, leading to confident yet incorrect responses. Without explicit signals indicating whether up-to-date information is required, models struggle to decide when to retrieve external evidence, how to reason about stale facts, and how to rank answers by their validity.