Someone exercises their right to be forgotten. Your team does the obvious thing. They delete the person's record from the systems built to hold it: the application, the database, the data warehouse. The row is gone, the ticket is closed, everyone moves on.
But feeding data to an AI is a separate pathway, and your deletion process was never built for it. To make the AI useful on your own data, you fed that data into it, broken into pieces and stored so the model could search and answer. That copy is a third place the person's data now lives, alongside the application and the warehouse, and it is the one nobody thinks to check. Deleting the record from the warehouse does nothing to it. Ask the AI the right question, and the person's data comes back in the answer, from a source that officially no longer exists.
That is the gap the law cares about. A privacy law is not satisfied by a deleted row. It is satisfied when the person's data stops appearing, everywhere it can appear, and when you can prove it stopped.
