The Error Changes Owners

On a robot’s corrected map, yesterday’s route can look absurd: a long detour around an obstacle that never existed. The obstacle was an error in the map. The detour was a response to it.

Keeping only your latest, most accurate account can erase evidence needed to judge an earlier decision.

Your records often perform two jobs: guiding present action and explaining past action. A correction that improves the first can damage the second. An obsolete entry may be false about the world yet accurate evidence of what someone was told. When the updated display doubles as the archive, knowledge acquired afterward starts to look like knowledge ignored beforehand.

A deadline in a shared document is corrected from Friday to Monday. Colleagues have already canceled plans and compressed their work around Friday. If only the corrected copy remains, their haste loses its visible cause. A manager arriving later finds people exhausted by a schedule that appears perfectly generous. The document is right. It no longer records what they were asked to do.

The loss is selective: the bad instruction disappears, but the cost of obeying it remains. A record can therefore make its author look more competent while making its readers look less competent. No conspiracy is required. Even a note saying “corrected” preserves the fact of revision, not what anyone previously saw.

An earlier version does not prove a sound decision. Someone may have neglected a required check. Reasonableness depends partly on what you should have discovered, not just what appeared on your screen. Preserving the earlier account supplies evidence for that judgment, not immunity from it.

Retaining the old map is not the same as continuing to navigate by it.

When only the corrected map survives, a mistake in the map can become a defect attributed to the traveler.