She isnt using it in a court of law. Have you been paying attention?
A committee hearing is the same setup. They do things the same way as a court of law.
They listen to the complaint, they allow the defendant the ability to refute that complaint, and perhaps that happens one more time.
The point is, they cannot deny Kavanaugh the right to seek that position based on what somebody "heard" especially if they will not attend to testify what they supposedly heard. In other words, it's all rubbish and not admissible in the court of law or a Senate Committee hearing.