Or perhaps less cynically, winnowing the pool to the group of people who have the personalities and temperaments necessary to complete a college degree. It does

Or perhaps less cynically, winnowing the pool to the group of people who have the personalities and temperaments necessary to complete a college degree. It doesn't have to be a perfect filter; false negatives don't matter so much if your filter leads to enrichment. I'm not saying it's "fair", I'm just saying there are rational reasons to do it.