Hmm, with the memory thing, I guess we could discuss it if it comes up? What happens is the book is that Lena and her boyfriend dig up a grave and her cousin and aunt are witnesses. It takes about an hour. And when they're done, the cousin says she'll tell on them, but Lena just makes eye contact and is like "Sorry we came out into the graveyard for no good reason," and the cousin is like "Ugh, you made us come out here for no good reason." So the situation was to erase what they'd witnessed while with Lena. In game, IDK what the situation would be where others notice Ezio has forgotten a recent event.