In some cases the documentation just plain wrong. Core data can be confusing, but worse with wrong documentation. I've had an open radar about the merge policy

In some cases the documentation just plain wrong. Core data can be confusing, but worse with wrong documentation. I've had an open radar about the merge policy documentation for over 3 years and nothing has happened, even after talking to a core data engineer at WWDC in 2018. These two should be the same, but see the conflicting description: https://developer.apple.com/documentation/coredata/nsmergepolicy/1690609-mergebypropertystoretrump https://developer.apple.com/documentation/coredata/nsmergepo... (in-memory changes trump) https://developer.apple.com/documentation/coredata/nsmergebypropertystoretrumpmergepolicy https://developer.apple.com/documentation/coredata/nsmergeby... (external changes trump) Same here: https://developer.apple.com/documentation/coredata/nsmergepolicy/1690607-mergebypropertyobjecttrump https://developer.apple.com/documentation/coredata/nsmergepo... (external changes trump) https://developer.apple.com/documentation/coredata/nsmergebypropertyobjecttrumpmergepolicy https://developer.apple.com/documentation/coredata/nsmergeby... (in-memory changes trump)