maybe becos of your hour pillar...... the self star group study kind, they past around info....... and sometimes will be tips from senior, or notes creates by some1..... there is some1 else to double check what the person is studing.... double check as in the content that is being studied......
authority study is copy from lecturer, then is highlight everything.....
...... then source is from past paper or ten year series..... authority takes things very seriously like will do alone...... friend star study feels like got assistant, and got a mirror...... "if some1 didnt study that i miss its should be ok...... he study that heng i got study that too......"