Blacks are the only category of human that have invented nothing, never developed any society, buildings, technology, moral code, or anything that fundamentally separates humans from animals. Add to this the simian shelf, skeleton proportions, skull shape, teeth shape, and other body features only found in gorillas and chimpanzees, and no other human race - and it makes you question whether blacks are even really human.
I have never seen a subsaharan african who was civilized. Any bit of intelligence always coincides with some other race polluting their animal-like bloodline. It is easy to conclude that pure, subsaharan africans have no traits that make them distinctly human.
I have done my research. What I did find led me to the conclusion that there is a very high certainty that blacks are indeed human-gorilla or human-chimpanzee hybrids, and not fully human. It seems that the closer a black is to its pure unadulterated racial form, the less human it looks and behaves.
At some point, I will write an article to compile my new research into the topic.
If researchers were to compare blacks as a species not already "assuming" them human, it would not be taxonomically possible to conclude that blacks are of the same race or specials as other humans, in the same way that it is not possible to conclude that chimpanzees or gorillas are human.
From a rational standpoint, there is a phrase, "if it looks like a duck, walks like a duck, and quacks like a duck, it's a duck". Likewise if it looks like an ape, walks like an ape, and acts like an ape - it's an ape.
From a moral standpoint, blacks are the least human on every level of all the races, as defined in my first paragraph above.
So, are blacks human? You decide.