This request is not the first lately that points out that people are 'missing' the second paragraph that actually describes the multidelete method -- I've seen at least three in recent days. Their eyes scan for 'deleted entries', lock on to the last paragraph, and don't realize that multidelete was already mentioned in the prior paragraph. So they think there's a seekrit we're not telling them, LOL.
So, I'd like to suggest the italicized phrasing be added to the last paragraph there:
"If the memory points to a deleted entry, or to an entry in a deleted journal, you will need to use the multidelete method described in the previous paragraph to delete the memory. Memories of deleted entries cannot be edited."