Independent cross-checks

A cross-check is strongest when it uses an independent source, method, or reviewer rather than the same answer in a new tone. This principle matters because an AI system produces likely output from the context and instructions it receives; it does not automatically know the organization’s current facts, private policy, unstated intent, or acceptable risk.

Use the following sequence for this page: choose a genuinely separate source or method; phrase the check without embedding the desired answer; compare disagreements at the claim level; record what remains unresolved after checking. The sequence is a guide, not a ritual. Skip a step only when its question truly has no effect on the outcome, and strengthen it when mistakes would be costly.

Return to the opening case: A product comparison from one chat is challenged by asking the same model “Are you sure?”, and it returns an even more confident version. Begin by rewriting the request as a small contract. Name the intended reader or user, the authoritative material, the operation to perform, the required output, and the review owner. If current information is required, identify where it will come from. If exact calculation or action is required, assign that step to a deterministic tool or an approved system rather than relying on prose generation.

A useful instruction could follow this shape:

Goal: help [reader] accomplish [outcome]. Use only [named sources or supplied material] for factual claims. Perform [specific operation] and return [format]. Mark missing information as TBD or ask a focused question; do not guess. Before the result is used, [named person or role] will check [criteria].

• Using two answers powered by the same stale source. This hides an important assumption or removes a review point. Replace it with an explicit rule, a source check, or a human decision.
• Mistaking majority agreement for truth. This hides an important assumption or removes a review point. Replace it with an explicit rule, a source check, or a human decision.
• Discarding disagreement without investigating definitions. This hides an important assumption or removes a review point. Replace it with an explicit rule, a source check, or a human decision.

Turn Independent cross-checks into a template you can reuse this week: job statement, required evidence, failure mode to catch, and reviewer. Store it next to your other spot wrong answers notes. When the job changes, rewrite only the job statement and re-run the same failure-mode list — do not invent a new workflow from scratch. Role of this page: Verification method.