In addition, Mrrzy's statement that African Americans who travel to Africa find out that they are sho'nuff not black presupposes two things:

1. that black is just a dark skin color
and
2.that all Africans have dark skin color

Not to mention that it is not true that prior to the end of US slavery all African Americans with White ancestry got that White ancestry as a result of White men raping Black women.

And it also isn't true that African Americans since the end of the US civil war have White Ancestry [only] because of rape.

If Mrrzy's Black friends don't want to acknowledge any White ancestry that they know that they have, that's on them. But the reason they gave her, doesn't hold true for most Black people I know.