Sans doesn't answer immediately, because he really doesn't like talking about that. That's why he talks about that first thing first: "If you woke up with all of us but think you should remember that mural, it's pretty weird it looks kind of worn out. If it was somethin' you picked up on a book or somethin', you'd think the at least some of the guys living here would know. If it's something you were there for--well, you're still a kid."

He's not disbelieving Angus, just pointing out that the mural is now even weirder. Returning to that memory question...

"I've got more facts and concepts than dates up here right now. I remember doin' the Candlenights thing twice, but it ain't like I remember everything in between right now."