[............ ah. Well, that. That, he can't help with. He's realized the same thing, obviously, that what Yona remembers and what he remembers differ significantly-- he only wasn't sure how recently Yona had met Lili.]
It seems not everyone comes here with the same memories. Just like none of us could refuse arriving here... no one could choose what we remember, either. [That means making anyone remember anything is not up to any of them. Just like it's not up to them to choose who comes with them, here...]