Talk:Sans/@comment-43916763-20200614222934/@comment-38454122-20200623233413

Technically, Sans doesn't fully remember. All we know is "Wasn't there ... another kid?"

Also, since after My Promise, the timeline got erased and a new one was created, note that there are at least three "relics" existing from the old timeline. These are: the vial of DT-rich blood that Frisk gave Gaster in exchange for repeating the experiment that got Gaster erased originally, the "Don't Forget" bracelet that Frisk was going to give to Sans, before receiving the news of his death in Dust, and the Heart Locket, which Chara left on Asriel's dresser with some tears. Also, remember when there was that whole little dream-bit with Flowey and Asriel talking? Before that, in the mirror, we can see the Heart Locket that Chara left.