Oh, I believe that she believes it. I can even believe that something like what she described actually did happen to her, maybe even multiple times with multiple attackers.
And I'm betting that that (those) traumatic experiences screwed her up pretty bad. I'm also betting that she couldn't accurately recall any of it. Memory, especially memory of trauma, is not reliable, especially decades later. She's probably distilled down a bunch of flashes and half memories into one semi coherent event, put some convenient names on it and has relived it so many times in her head that now, to her, it's real.
The really shitty thing about her is she should know better than to trust her own memories on the subject.
I have to agree.
A few years back at one of my MP Company's reunion, I was telling a story about incident X, involving two of my soldiers. Soldier A and Soldier B. When I was about half way through, Soldier B says "That wasn't me." (Soldier A was not present at the reunion).
Me: Sure it was, you and Soldier A were always together, on and off duty.
Soldier B: Sir, I'm sorry, but I wasn't there for that, as much as I would love to say I was. Sorry sir, it wasn't me.
Me:
And couple years later, at a different reunion Soldier C says, "Hey sir, remember the time me and Soldier A did incident X and you saved our bacon with the commander."
Me: !!!! So it was you !!!
Now, for 20+ years if you would have put me on the stand and asked me under oath, "Who were the two soldiers involved in incident X ?" I would have said, without hesitation, and being 100% confident, that it was Soldiers A and B. And I would have been completely (well, maybe not completely but at least 50%) wrong.
So I do feel sorry for her if what she claims happened, happened. However, I think it's totally plausible that once Kavanaugh's name bubbled up in the 2012 election as a potential Romney pick for SCOTUS, that she latched onto that name as her attacker.
And has convinced herself that he's the guy.