Hmmm, I don't recall one.
The closest I remember is where L&C come up with an idea and tell Perry. He sees right through it and comes up with something else. I can't really remember though if he admits that he knows 'everything', but just their story doesn't pan out and he helps them smarten it up a bit. I can't remember the name of the story.
If there is one out there, I would like to read it!
