Taare Zameen Par

Recently, they added the marking scheme to the show and a way to scare the participants by introducing revision zone. What they do in this scheme is they allot marks to the participants, whatever they feel like giving. Now what the participants must be expecting is whenever a judge gives less than 10, they should explain or give remarks as to why they deducted marks. But what actually happens is they just gives incredible remarks to the participants and give 8 or 9. How are they supposed to know why they deducted the marks?