"no one has proved that the documents were not authentic."...
Actually, they HAVE!! That's the reason she was FIRED!!!! When you say documents are from the 1970s and they can be shown to be word processed in Microsoft Word, a type that was NOT AROUND in the 70s...they are NOT AUTHENTIC!!
But does the interviewer question her on that? Of COURSE not! She is not challenged, so for those who don't know or who have forgotten, the lie can be passed on until they revise history!