Well in the Bill Cosby case it's a case of he said vs she said, she said, she said, she said, she said, she said, she said, she said, she said, she said, she said, she said, she said, she said, she said, she said, she said, she said, she said, she said, she said, she said, she said, she said, she said, she said, she said, she said, she said, she said, she said, she said, she said.
Oh and he pretty much confessed that drugging women was the way to get his end away in his autobiographies.