Burton Guster and Prue Halliwell
"Trust me, in this place you never know," she said. "Get as many different universes together and you don't know what's going to happen. I mean, there's a couple fictional characters, a couple places, and at least three mythological figures that it could've been."
When you were a witch -- and especially a Charmed One -- you learned to be very specific about things. Not being specific tended to lead to problems. Not that this was that, but there were things you never could entirely shake.
Sorry, Gus. At least it's just an overabundance of knowledge.