way that ultimately might shift where law is but currently these are not claims that are -- cost misablend help to understand that phenomenon needs to be named before they became actionable once upon a time a black woman would not for example, bring a claim of that on basis of court and sex and if black men are not descrimentd against it is not race discrimination if white women are not discriminated against it's not sex discrimination so you're experiencing it is not discrimination because black men and white women are not experiencing it. those cases were not historically recognizable now they are. whysome because people like my colleague kimberly crenshaw introduced that ultimately shifted how courts think about this matter. so before one brings it to the floor one can't expect to do much about it but we wanted to o write this book as a way to exercise. so at least have a debate -- don't have to agree with me but at least have a debate about a different waif thinking about discrimination. >> something is else you rerns is joe biden remarks about barack obama before he was elected pres