Ah, there, she got it! "Yes! Taking a preexisting world and characters and either extending on from the canon story or creating new scenarios that didn't take place in the story in the first place." Simple, right Alice?

Oh, "Ah, I was working on a murder mystery based story and needed to find out if there was a safe dose of rat poison that would not kill a human or give them long term damage, but still show signs of being poisoned. Or if there was something to give similar symptoms and be traded out for it instead." You know, to cause doubt and confusion and trick the reader into thinking it was serious when it really wasn't.