When considering feasibility/probability, look at motive.
If he didn't molest these women, what motive do they have to publicly accuse him?
They are paying a cost for this: death threats, having to move their family (with the first woman at least). Knowing the kind of nutters that are out there, I wouldn't put my family in danger unless I was getting something very, very big in return. Even without the danger, putting yourself in front of cameras for the whole world to decide about you isn't an easy thing. One woman is risking her career (clearance).
So what would that be the thing they are getting in return? Two possibilities come to mind.
Money, a lot of it
Justice
If it's money, it's something we can find out, correct?
In short, they are either getting paid off bigtime for this, or they believe Kavanaugh molested them. I don't believe someone would just make up shit for no reason and put their families through this.
see #2666