It is shameful, I feel, that we even have to make this point. That it is necessary to say, even once, that Black lives matter is itself a testimony to the racism of our society. It ought to be obvious that Black lives matter, that Black people matter, and by implication, that their murder, especially at the hands of the state, cannot go unanswered. And yet it is not obvious. It the context of the legal system, the recent evidence suggests that it is not even true. The slogan represents, then, not simply a fact, but more importantly a challenge. If we believe it, we must make it real.