I don't believe a word of it.
This is a calculated ploy to derail a nomination by a president they hate via any means available.
#1. She can't come up with even an approximate date prevents him from providing any kind of an alibi. "June 15, 1982? That was my cousin's wedding. Here are pix showing me there." Or, "my grandmother's funeral." Or, "I had an appendectomy that month and was at home, recuperating."
#2. She told no one. Come on, really? She didn't warn her friends to stay away from this guy? Any teenage girl would have told her bestie(s).
#3. The details in her therapist's report are equally vague. She apparently didn't name Kavanaugh, she referred to "an elitist prep school," not any specific school, and said that he had become powerful. Well, that could apply to a lot of people.
#4. There have been no other accusations against him that are even remotely similar. (Yet. What do you want to bet that there will soon be any number of other radical resisters who come forward with identical stories--including "I never told anyone about it--until now.")
As the mother of two sons, one of my biggest fears was that some crazy chick would come up with some unverifiable accusation against one of them and destroy his life. That is what is happening to Bret Kavenaugh, and it is a total travesty.
If this is allowed to happen to derail Kavenaugh's nomination, there will never be another conservative successfully appointed to any position.