This is some eugenics shit; I expected better from HN. How can you tell who is black from who isn’t? There are light skinned people who pass for white, and dark

This is some eugenics shit; I expected better from HN. How can you tell who is black from who isn’t? There are light skinned people who pass for white, and dark skinned people who don’t. Sometimes this is even within the same family with the same parents. What percentage of “black” DNA counts as “black”? Is it 25%? 10%? How can you actually measure that (the “ancestry maps” you get from sites like ancestry.com are pure fantasy with a loooooot of questionable assumptions baked in if you look into the actual science behind them). You can have African ancestry without being considered black. You can have dark skin and have a majority of European ancestry as well (which is true of many dark-skinned people in the US given the propensity of slave owners to “make their own” new slaves). Which is more important — the African ancestry or the European ancestry? Are genes associated with dark skin more powerful or something?