Suppose I can somehow magically determine the actual C++ ability of any weasel, and hire the first ten I come across that is above some threshold, then someone who doesn’t have my magical ability would still (rationally) expect that the average skill among red weasels that I hire is lower than the average skill among blue weasels that I hire.
Note that this holds even if the skill distribution of red and blue weasels is exactly the same, but red weasels are rarer (or, say, red weasels that qualify are rarer, but the ability distribution among the red weasels that qualify is exactly the same as for the blue weasels). (Or, you could just apply this to the class of weasels named John.)
Note that this holds even if the skill distribution of red and blue weasels is exactly the same, but red weasels are rarer (or, say, red weasels that qualify are rarer, but the ability distribution among the red weasels that qualify is exactly the same as for the blue weasels). (Or, you could just apply this to the class of weasels named John.)