First, I agree with your opinion, 'The absolute grading system of CSAT will be not good at the student'. Why? It's because as you said 'It's UNFAIR'. Imagine that you studied hard and you got 100. However, your friend who just play got 90. Then how would you feel? It will be so bad. Because you got a same grade with your friend. Like this, it's unfair. Therefore we have to oppose 'absolute grading system'.