These aren't the divisions I would make, I was specifically referring to your question in the parent post about an Asian simply claiming to be black to bypass discrimination. I was pointing out that other factors, such as names, would be used whenever possible to still be able to discriminate against even those who tried to hide or falsify their race.
I am not arguing that such discrimination or racial categories are valid.
But there must be some less arbitrary way to apply this discrimination? If there's no clear definition how are they falsifying their race? An Asian American could claim their ancestors came from Africa and they would not be wrong...
Other countries have official recognized minorities which you get from your parents, or use the birth nationality of your (grand)parents.
I am not arguing that such discrimination or racial categories are valid.