
Originally Posted by
Regis_Paran
I didn't do sidequests there yet. But from the get go my suspicion was that it's not just the "offending" memory being removed. But also "positive thoughts" put in. And we know it can be done, because Sphene is changing her own "programming".
The way I understood it the person is just removed from your memory completely.
For example, in the MSQ we observe how Erenville meets some people from his former village. They all recognise him but they have no idea who his mother even is, although they did know her for sure in the past. Erenville says so himself because he cannot believe how they could have possibly forgotten her.
And in one of the side quests
the aforementioned viera tells you how, when his friend died, all the other friends of said deceased person have already forgotten them. So those friends' minds weren'd fed any positive replacement memories as far as I understand.
(Also, this is another point that I find quite unsettling. Imagine you have a close friend, their parent dies, and you just don't remember your friend's parent all of a sudden. You know this person but where they come from and how they grew up is (partially) purged from your mind. And if you are a close friend then their growing up was most likely also a part of your growing up since you spent time with them in your childhood. So in some way parts of your own childhood (even if it's just tangential memories) would also be gone. Such as spending time at your child friend's house but in your memory there is absolutely no presence of their parent in that house.)