Are you really this dumb. Witnesses state what they've seen and heard.
That's all they do. There statement could be verified by other people but they don't have to be.
If this were a trial (which it's not) the witness would state what they've seen and hear and the jury would decide whether to believe this
Actually, before being called to the stand, witness testimony has to be verified, otherwise it would be discredited by the defense, causing the entire prosecution to potentially collapse. This has not occurred with these witnesses.
Do you actually not understand this?
Sure, I understand that you have zero understanding of how our legal system works.
People believe all sorts of accusation without proof and even after they are proven false
For an example, take any bullshit you believe about Hillary Clinton
Which is why people can't be trusted to make decisions on innocence or guilt without professional lawyers and a judge to filter the information for them and only tell them what they need to hear, rather than whatever everyone in the general population tells them. In case you hadn't noticed by now, people are dumb. Look who they elected.

can you post the section that states "accusations are false by default until proven otherwise"
Yep
The 5th and 14th amendments to the U.S. Constitution guarantee “due process of law” to all persons, including foreign students and other aliens in the US. Due process of law requires that orderly legal procedures be followed to establish guilt before a person can be put in jail or otherwise punished. In the United States, a person is considered innocent until proven guilty. The 14th amendment to the US Constitution guarantees to every person, aliens included, “equal protection under the law.” Equal protection under the law means that the law applies to everyone equally, regardless of age, sex, race or wealth, and that no law may discriminate between persons or classes of persons. There are, however, laws that apply only to certain classes of people, such as aliens. As long as there is a reasonable basis for these laws, they satisfy the requirement of fairness and justice. These laws may limit and modify basic rights. Except for these special alien laws, foreign students are subject to the same laws as are American citizens. They are also guaranteed the same protection under the laws and the same civil rights as are American citizens.
https://www.wabash.edu/international/uslawsI'm looking forward to Kavanaugh slander suit against his former classmate
If he doesn't file one I assume the statements made are true
He certainly will if he's not appointed. I hope he does, and I hope he wins.