I think Barbara Bowden and Joan Tarshis were very eloquent about why they did not report what Cosby did to them. Read or listen to what they said. Hint: the words shame, guilt, humiliation, fear were used. They said: "He's Bill Cosby. Who would believe me?" An attorney laughed at Barbara Bowden.
And here we are with all these women finally mustering the courage to speak, and sure enough....many people don't believe them!
As for proof? That's for a court. I believe Bowman feels she has evidence, and Tarshis had told several friends years ago. But, yeah, there's probably not evidence all these years later. That does not mean their statements are untrue! And they acknowledge there will be no court due to statute of limitations. What they want is to support the other victims and receive some validation. They deserve it. He should acknowledge his actions and apologize. Of course, he won't.
Listen to or read what they said. If you don't understand how rape affects a victim, ala, shame, guilt, fear, humiliation, etc., then educate yourself, or try to imagine being in that position. I don't understand why some people, including so many men, can't understand why a girl/woman doesn't "just go to the police." Seriously? It's like being victimized all over again, but publicly! It doubles, triples, quadruples the humiliation, etc.
I don't know know anything about Janice Dickinson. I haven't heard her statement yet.
I just wonder when he will sit down with some interviewer to deliver some well written, rehearsed story about his innocence. I think his ego will compel him to attack back in a "woe is me" way. Blech. As for now, well, he may be a rapist, but at least he's not denying it with lies. That's the only good thing I can say about him right now.