How do know she's telling the truth? I'm not inclined to give any high level Meta person (current or former) the benefit of the doubt. I haven't read the book,

How do know she's telling the truth? I'm not inclined to give any high level Meta person (current or former) the benefit of the doubt. I haven't read the book, so I don't really know what kind of, like, proof or anything she includes (or could include). Is it just a "trust me not them" thing?