The movie ‘Groundhog Day’ is about a man who relives the same day over and over again repeatedly. Because the day is reset, he is able to re-play each interaction with any person repeatedly until he can convince them of whatever he wants or work around them …
In chapter 77, H&C performs a similar hack. He tries to convince her, then obliviates her memory and uses his gained information to convince her even more, etc. Instead of resetting the day, he is resetting her mind back again and again.
This was addressed in the previous thread: