So, scientifically-speaking, you are able to re-gain blackness so long as any white genes in your lineage are removed by a couple of generations?
So taking Jesse Williams and his family for example...
Because Jesse is mixed, his kids can't be black even though they have a black mother. This, their kids are mixed.
And even if their kids procreate with "full black people," their kids cannot be black because Jesse is mixed. So, Jesse and his wife's grandchildren are mixed.
If Jesse's grandchildren, however, procreate with other "full black people", they finally will reach the scientific measurement for blackness because that'll mean there was no white blood for a couple generations and that scientifically makes them black. UNLESS all "cac relatives" have died off. If Jesse's mother is still alive, however, these kids will still be considered "mixed" or "other" but most certainly not "black." But once all cacs have died, we can have a pure black race, again.
That about right?
What journal is this scientific analysis published in? I would like to learn more.