Pretty basic CYA. Disgraceful.
You know, if you post stuff on these boards regularly with information that is credible, and don't try to spin crap too much, if you say something, I'm gonna consider you credible, because I've believed you so far.
That being said, if you post on here about your beautiful new Porsche that you just bought, because I find you credible, but don't know much about you other than what I see here, I will believe that you bought a Porsche, even if you don't post pictures (but if you did buy one, you'd more than likely do so).
If you continually post troll posts and spin crap incessantly, then I won't find you credible, and if you tell me you bought a Porsche, I will call B.S.
Feinstein can't swear to the veracity (truthfulness) of the letter, but because she has met Ms. Ford and has seen how this event has affected her, she believes her to be credible, and is willing to trust what is in the letter.