A post-factum application of [[Knowledge decomposition]] to resolve [[Knowledge duplication]] - extracting shared content into a dedicated record that both overlapping records can reference. Pattern: 1. Two records `X` and `Y` share content 2. Extract the common part into a new record `Z` 3. `X` and `Y` each retain only their unique content, linking or embedding `Z` `Z` becomes the [[Golden Record]] for that shared concept - a single authoritative source instead of two diverging copies.