The developments within just a few minutes clearly exceeded the expectations of both Yuan and Li.
Just like Fu Qian's mission having more than one purpose, their suspicion of the connection between the Archipelago Assassins and the new Demigod from Heaven's Commencement Institute likely began earlier.
The unexpected reversal after focusing on test details was undoubtedly intended to use this contrast to observe and respond, thereby "extracting" more information—even at the risk of offending an academic leader.
After all, such a questioning approach equates to directly assuming the matter was done by the other side.
If mistaken, it could constitute serious defamation.
Of course, even if correctly assumed, it doesn't mean there is no risk.
Don't forget that this academic leader is also a newly-promoted Demigod.
If there are truly unspeakable secrets behind, once confirmed and discovered, an extreme reaction is not impossible.