Eliminate all impossibilities, and what remains, no matter how improbable, must be the truth!
This phrase has been widely employed in various detective novels, television dramas, and cartoons, to the extent that Ye Weiming couldn't remember its original source.
Embracing the spirit of "The great words do not ask for their origin," Ye Weiming decisively gave up pursuing who said this phrase originally. As long as the reasoning holds, he could directly use it in his deductions.
For instance, the trouble he encountered this time, after eliminating all impossibilities, the only thing that can gather these people is the 'Six Meridian Divine Sword', nothing else is considerable.
Firstly, as for Jiu Mozhi, it was clearly written in the original work that this monk coveted the 'Six Meridian Divine Sword'. This point could be considered as one of the game's background information and referenced directly without extra words.