Board Thread:Questions and Answers/@comment-29905311-20170130083321/@comment-27701762-20170131200125

And yet I am showing you from the game's code that Sans was designed to give that line regardless of whether you completed a True Pacifist run or not.

In turn, I have provided several alternative possibilities that explain that line and everything else you have pointed out, all of which do not require in any sense that Sans remembers a True Pacifist run. All of which are perfectly consistent with how the game tells you it's working. In comparison, you are insisting on a version of events which are directly contradicted by what the game tells you. Including the fact that Sans behaves the exact same way whenever you perform a True Reset, but alters his behavior in slight ways (as all the major charactes do) if you perform a normal Reset, which flies completely in the face of what you're trying to claim.

In fact, you are even presenting incorrect information, since Sans will give you advice about blue attacks, even if you've killed Papyrus in the past, provided that you've performed a True Reset between those events.