Tell me about it. [This is a weary, deeply rhetorical comment - he knows Soren is quite literally telling him at this moment. He shakes his head and glances away for his own contemplation, a weighing whether to share his pet theory. After a couple seconds, he goes for it.]

You know... I've been thinking. People are pulled in from different worlds... But some of those worlds sound so similar. Same names, same countries... I wonder. Could there be, more than one world with Papyrus?

[He's cool enough to have multiversal counterparts and still be cool even without uniqueness, isn't he?]