Board Thread:General Discussion/@comment-26006155-20190820122909/@comment-32182236-20190919204907

And my evidence for Papyrus never meeting a human is because Sans explicitly says this. Under your take, he'd be trying to hide his nature, so he'd exclude himself from the list. But he wouldn't exclude the other fallen humans. So this means Papyrus really wasn't around to see other humans.

So Chara fell more than a generation before Frisk.

And I don't mean the lifespan of a monster. Monsters can live to be far older than humans. I mean an actual generation.

It seems as though there's about a 100-year gap between Chara and Frisk.