Board Thread:General Discussion/@comment-4504826-20160426040035/@comment-26814804-20160427012457

Allright, here's my counter to the "Sans alludes to his previous statements" argument.

So, Sans is a smart guy, and he knows he's dealing with an enemy who can come back from death easily. I'm sure, if he looks at your face and thinks, "Ok, they've died five times, so I'm going to psych them out by counting their deaths," then he has to also think "Well, that means that the last time they died, they had died four times. So what would I have said if they had died four times? Oh, I'd get confused about what the adjective form of four is." So he does that.

And as for knowing about a Genocide run, that can also be explained by his reading your expression. Sans looks at you and sees a SOULless killer, because you look like one. It's the expression on your face.