Board Thread:General Discussion/@comment-31536324-20190117214835/@comment-33883848-20190318194252

"How can Sans guess LV to begin with? That is the question you should be asking."

To me thats related with his ability to interpret your facial expression,i mean he clearly show that he can guess the number of your kills simply by looking at Frisks facial expression"whats that look'did you just kill someone to figure out what i would say"so i guess he can guess the number of exp or lv you gain by this same method