Board Thread:General Discussion/@comment-26980570-20160320192450/@comment-27907368-20160323063313

Does sans know that humans are the source of this anomaly? I'm going to hesitate and say that he doesn't. I don't believe he ever alludes to knowing that all humans have this ability or, heck, that we are even human. Remember, in the genocide run at the beginning with our first encounter with him he asks us to keep pretending to be a human to appease his brother.

And as for the "You'd be dead where you stand." I can't offer much concrete evidence here. We only get this dialogue in neutral (if we haven't killed his brother) and in pacifist. Maybe he goes into it thinking that he can glare down what he thinks to be the anomaly but instead he hesitates. Immediately afterwards, he says "kid, I'm just joking." He only has this encounter with you when there's at least a darn glimmer of good in you.

We can't see Frisk's reactions in game, but perhaps Frisk would have looked scared at this point and sans would have regretted what he'd just admitted - that he was on a human-hunt regardless of the human's redeeming qualities. This goes against his justice attribute, too... I'd like to think that he wouldn't have killed us without Toriel's intervention, but hey. Speculation.

Here's a little thing about sans. If you get to the end of true pacifist route and replay and get the key to sans' room (and garage), you'll get this text. Now, that's heavily implied to be the picture we see from the end of true pacifist. The kicker - this picture stays, even after a true reset. You know, even after Flowey's memories are gone, he keeps this picture. He knows there's a good you. One that went to the ends of the earth (without losing your soul by committing genocide first) to save everyone.

How haunting would that be? He sees how good Frisk is to then be met with the horrors of genocide later on. This is also how he knows that you're a part of the timeline resetting.

Sans remembers. He remembers that you reset his happy ending. Poor skelly.