The devil’s triangle is in the details…
She was in the appropriate area at the appropriate time - right age group, peer groups with minor intersecting. She said she had met Kavanaugh but did not socialize with him, and certainly not after the (alleged) incident.
She may have forgotten a lot of the surrounding details, but the incident itself she claims to remember well. She identified several people that he hung out with, by their nicknames (“PJ”), 35 years later. There is even a calendar entry that appears to match the timeline she gives (July 1st) where those boys were together. She gives a decent amount of detail about the attack. Of course, nobody else remembers because the event does not stick out in anyone’s mind 35 years later, because to them there was nothing notable or traumatic to make it more memorable than dozens of other get-togethers and parties every year during high school.
(I went to several parties in high school 40 years ago - I remember some details, but I sure as heck couldn’t remember any addresses or who all attended or how I got there - I would guess transit…and I was sober)
Then there’s what she didn’t say. She also claims a limited attack - if this were fictionalized, why stop at “they couldn’t get my bathing suit off”? why not claim out-and-out rape? it would certainly be more shocking, more likely to tilt people against him. There’s no evidence she was a rabid activist in any of the causes that indicate the inclination to fabricate a desperate take-down accusation.
Now consider Kavanaugh. His calendar and associated data - yearbook, Judge’s writings - revealed a significant degree of drunken loutishness, which of course he tried to deny. (IMHO, unconvincingly) Of course, he had to deny - admitting he got too drunk to remember things would lend weight to her story. His attempts to deny and cover up simply add to lack or credibility, and attacking the Democrats should have immediately disqualified him. On top of that, he outright lied about a number of things. (Seriously - Renate Alumni? or “I threw up on the way back from the beach because I have a weak stomach”? or “devil’s triangle isn’t what the world said it is, it’s a drinking game that nobody every heard of”, or “ralph does not mean throwing up. Oh wait, it does, but I have a weak stomach.”
The republicans and the white house didn’t help things by making the FBI limit the list of interviewees for the follow-up background check. It just added to the suspicion they were hiding things.
This is not criminal (although it could have been). This is vetting a person for one of the most serious jobs in the land. If there was any hint that this person was less than pure, that he ha committed drunken sexual assault or condoned torture of arrestees, or any other suspicions of shortcomings… well, there are several better-qualified candidates. What’s the line about “Caesar’s wife must not only be above suspicion but also be seen to be above suspicion.”
As to the OP - when you hear an accusation, the process is to listen to both sides and assess who has the most credible story, the most credible character. In a criminal case, you need evidence to prove beyond a reasonable doubt, because the consequences are severe. When you are managing a restaurant or a world power and need to safeguard its future reputation, you must make judgements based on the smallest of character indicators.