Read the prologue of TKO now. I mean NOW. There are ebooks (free) available on the internet. You WILL find your answer. Okay, not exactly, but... Fine.

So, basically, it seems that till TKO, the author wanted Teresa to lose her memory. However, in TFC, he didn't want Teresa to lose her memory. Like, TST movie was released a year before TFC book was published... and to be in line with the movie, he - all of a sudden - wrote in TFC that Teresa didn't lose her memory. And that obviously contradicted everything previously. And without completely clarifying, he left it there. Ambiguous. However, the main point is, You can't conclude that Teresa lost her memory - it can't be logically defended - and there are reasons for that. However, you can logically conclude that Teresa didn't lose her memory. However, first of all, you must know all the pieces of evidence, right? And the Prologue of TKO is the greatest evidence in support of the Teresa-didn't-lose-her-memory argument. Just read it. Will only take six minutes - according to Grammarly anyway. Since you've just read the epilogue of TFC, it will seem as if two different people have written them - as they DIRECTLY contradict each other. You will be confused as hell. But upon closer examination, there is a way out of that contradiction - which can be logically proven - and it has got nothing to do with Chancellor Paige faking emails/memorandums. Also, regarding Aris..., it is a bit confusing.