People say if your half black, you're all black. Fun fact: Mixed people were treated the worst during segregation. (or so I've heard) People call me black, even though I'm super pale for a black person.

Because in North America the term coloured is extremely rude
yet in Africa it is rude to call a coloured person black, but hey.

Wouldn't he be like any range of numbers blacker? I can be 1% blacker than a black dude, or I can be 1000% blacker than a black dude, right? If obama is 50% blacker than a white man, that means he is 150% percent as black as a white man, which means that the white man has to also be some black. As you know, 150% of 0 is 0.

hes basically infinitely blacker than any of the past presidents as they would have had as close to n black in them as possible.

What about Clinton?