As members of the top echelon in the Poison Hall—and this was especially so for Shen Jue—in order to find the legendary Tome of Poison Legacy that their founder had left behind, they had spent most of their days roaming the world. On their journeys, it was inevitable that they would meet with several powerful master teachers, and there were even some occasions where they had exchanged blows with the grand elders of the Master Teacher Pavilion headquarters. Even so, they had never heard of any master teacher being able to analyze everyone's condition accurately with just a look and devise strategies on them in just a few seconds!
This was not just at the level of being discerning anymore but being omniscient!