Credible? In what way?
How is it not?
Where has it been disproven?
It doesn't have to be. It is assumed to not have happened until proven.
Hence the need for an investigation.
Derp.......
Hence the need for the alleged victim to talk to the investigative body.
"Derp."
Who says she won't?
She's trying to dictate the terms and conditions Uber which she will testify and Congress has bent over backwards to meet her demands. It's time for her to put up or shut up.