Answer:
I think if you try hard enough you can forget things, I'd say people would try to forget things that may have hurt them, or caused emotional distress. And if you can't make yourself forget, then your just stuck with sad memories. Hope this helps!! (:
It's historical accuracy with fiction. They aren't always written in first person, that'd make it more fictitious than realistic. However no autobiography or memoir will be down to the word exact. It's just not possible unless you record every single thing that happened every single day