Well the problem that we're trying to address here is inequality of outcomes. Grading people against how intelligent we would expect them to be tends to be too

Well the problem that we're trying to address here is inequality of outcomes. Grading people against how intelligent we would expect them to be tends to be too obvious, and going out of our way to cognitively impair some of the them would be too controversial, so our only option for the time being is to redefine what attainment is.