The black woman is not held less credible, however her story is.
There is a difference between the story and the person.
Honest Harry (who has never once said a lie in his life) tells you that he slapped an elephant.
Lying Larry (who has never once said a truth in his life) tells you that he slapped a balloon.
Who’s honesty is more credible? Honest Harry’s of course, why he’s never once lied about anything, while that fink Larry lies through his teeth persistently.
Who’s story is more credible? Lying Larry’s, because lets face it the likelihood of Harry slapping an elephant is far lower than the likelihood of Larry slapping the balloon.
The only time the black woman or the white woman’s credibility in relation to honesty is called into question is after determining that one of them lied without a doubt, which is not possible to claim in our scenario. Seems part of the problem is some seem to insist that is what I am trying to claim.