This is a failure of mathematical (and, frankly, verbal and philosophical) understanding. If you have 10 arrests shared between 7 white men and 3 black, with 1 black man having allegedly offended 5 times and 5 white men having allegedly offended once, where do your resources go? Or the opposite, 1 white guy with 5 arrests, 5 split between 2 black men? Howsabout in a country with presumed innocence? In a country - in individual police jurisdictions - with a history, in living memory, of frivolous arrests made for economic purposes? In a country whose only peers in incarceration are dysfunctional, systemic human rights abusers?
Yep, the data was counting arrests, not individuals.
You raise some great points, but in the context of the discussion I don't see how any of the comments represent a failure of mathematical, verbal, and philosophical understanding.
