Board Thread:General Discussion/@comment-26006155-20200107155350/@comment-26006155-20200123090224

The next step is to check to see if Sans actually remembers things between runs or not, or if he does what Toriel does when she asks Frisk is he’s seen a ghost, and react to his facial expression.

From the changed facial expression, Frisk can certainly remember rewinds.too. Although resets might be different.

I’ll do some digging when I get home.