Yeah, that's why I'm curious about next chapter. The author couldn't possibly have her explain any reasonable proof, because to this day it still hasn't been proven.
So I'm pretty sure Liuli is going to say something she thinks is really smart, but is totally off-base in a cutely airheaded kind of way. Then Wang Lu will tsukommi, and amusement will be had by all. Then somehow it will give him an insight towards how to turn the current situation to his advantage.