"Now, you all know the rules, so here they are again."
— The Goon Show, "What's My Line?"
"Free screen-writing tip: No member of the human race ever begins a sentence with, "As you know." If they already know it, why are you telling them what they already know?"
— The Spoony Experiment, Night Claws
Homer: Well, here we are at the Brad Goodman lecture.
Lisa: We know, Dad.
Homer: I just thought I'd remind everybody. After all, we did agree to attend this self-help seminar.
Bart: What an odd thing to say...
— The Simpsons, "Bart's Inner Child"
Caslet tried very hard not to sigh. Shannon really didn't understand how irritating it was to have things you already knew explained to you. On the other hand, her lecture mode normally insured that she caught anything you might not know . . . or that you'd simply forgotten to consider.
Quirrell: My Lord, the Yule Ball has finally arrived and I've brought the key!
Voldemort: Yes, I know, Quirrell! I hear everything you hear!
Sam: Boy, Grandpa Stinky, I sure am glad to see you back working in this diner again after returning from a long time away to work with your granddaughter who is also coincidentally named Stinky.
Grandpa Stinky: Was all that really necessary?
Sam: Sorry. Max is all short-term memory. I have to bring him up to speed every once in a while.
Max: *shocked* AHHH! Giant talking dog!
Seanbaby: [as intro news anchor] Tonight's top story: Everything you already know because you're living it.
—Broken Pixels - WWE Crush Hour
[T]he main character's usually some empty-headed prick who's been living in this world his entire life but still needs to have situations explained to him because I guess he never paid attention in burly warrior school.
Powell: If any [robot] gets within twenty feet of us, we'll be sensed whether we're in the line of sight or not. I hope you know that.
Donovan: When I need an elementary lesson in robotics, I'll file an application with you formally, and in triplicate.
Dr. N. Gin: But Dr. Cortex, to reach full power, we need not only your master crystal, but also the remaining twenty-five slave crystals on the surface. How do you expect to retrieve them when we don't have any earthbound operatives left?
Dr. Neo Cortex: You fool! Do you think I'm unaware of the situation?!
Harry::All right Murph, Thomas, Faerie Fighting 101.
Thomas: I know, Harry.
Harry: Yeah, but I'm going to go over it anyway, so listen up.
"If you're actually going to put the line, 'as you may well know' into your script, why not just tell the truth and have them say, 'I'm going to be talking to the audience for the next few minutes'?"
"Yeah, and if I recall correctly, that's all the stuff we already knew."
"I don't have to explain how important this is, Proton," said the President of Earth, "but I'm going to anyway for reasons of exposition."
— Plan 7 of 9 from Outer Space by Odon
"As you know, person I am referring to by name even though you're the only person I can possibly be talking to, this is a clumsy way of delivering exposition."
— Alfred Smith, Jake Englishs Mysterious Theater Of Scientific Romance From The Year 3000's MST of Atlanta Nights.
"[...]As you no doubt know, Captain—" the Marine's tone suggested that she might not know but chose, diplomatically, to assume that she did[...]
—Captain Papadapolous, On Basilisk station
Finn: We've got to round up all the wizards and find the one named Ewlbo!
Jake: He's the one who gave BMO the virus!
Marceline: I know, guys. I was there. I, uh, understand events that happen around me?
"I love it when you ask questions you've memorized the answers to."
—Hazel, Girls with Slingshots