What is abstention in AI root cause analysis?

Abstention in AI root cause analysis is the system's explicit decision to say it cannot determine the root cause from the available evidence, and to state what is missing, instead of returning its best guess. A confidently wrong root cause is worse than none, because teams act on it. An abstention statement records the hypotheses considered, the confidence in each, the telemetry or change data that would have been needed to decide, and any contributing factors that were established. Abstention rate is then a published service metric alongside accuracy and time to RCA. Buyers evaluating AI-driven RCA should ask whether abstention is a first-class output or an afterthought.