I know enough to tell you that both Tyson and Ali scored below 80, which in theory would indicate borderline retardation. Then again, how many retards do you know can improvise poems, master rethorics, display world-class charisma while at the same time manage successful careers with multiple businesses. And become political figures that define their time. That's how useful that test appears to be. Perhaps revisit your assumptions. And dare I say prejudice.