I would like to discuss merging two potentially duplicate customer records using [fictional or redacted examples] first. This does not authorise an actual merge. Please explain: 1. How would you confirm they represent the same customer and choose the primary record? 2. Which conflicting values would be retained, and which require manual confirmation? 3. How would orders and attachments from both records be linked, and what cannot be merged? 4. Can a preview be provided first, and what checks would be recorded after an actual merge?