[Quirking her mouth, she doesn't bother answering that first question with anything more than a half-snort. If she didn't think she could do it, she wouldn't try, would she?

But good. He's already guessed why she's still hanging around, so she can skip the step where she has to tell him (never ask) to help and just explain why she needs it.]

Things will go more smoothly if I properly understand what I'm working with. It's like the difference between knowing if the switch you're about to flip turns on an overhead light or the garbage disposal. Finding out through trial and error just isn't efficient, or appealing.

[Because for this analogy, her proverbial hand is in the sink when it comes time to test that. All in favor of avoiding that mess, say "aye".

Rin waves her phone at him.]

You're the expert on these, so if I'm not sure how something I'm working on functions, or how my spell would effect it, I'll ask you first. You don't need to do anything beyond answering my questions.

[She grins at him.] No hard work. I'll be handling all of that. So not even you can complain, right?

[If it's just explaining the functions of a system he helped design, she assumes Sans could probably do it in his sleep, anyways. Nevermind while continuing to work on the generator.]