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alt title(s): As You Know Bob
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"

A form of exposition where one character explains to another something that they both know, but the audience doesn't. It has been described as a "pernicious form of infodump through dialogue".

"As you know, Simon, Jennifer has never been the same since the tragic codfish incident."

"As you know, Jennifer, my Death Ray depends on codfish balls."

In discussions of science fiction this is often As You Know, Bob (abbreviated AYKB), or occasionally, "Tell me, Professor [about this marvelous invention we all use every day and have no reason to be talking about except to inform the audience]". Poul Anderson referred to this as an "idiot lecture", in the sense that either the lecturer must be an idiot, or the lecturer must think the lecturee is an idiot. Nevertheless Anderson used the device often at the beginning of short stories, usually to establish historical details. The other common variation involves a newspaper reporter sent to cover events.

Terry Pratchett refers to the fantasy fiction version as the "As you know, your father, the king..." speech.

This is also a common feature of pilot episodes, where characters' backgrounds and relationships need to be established for the first time. Likewise, when new characters are introduced or the writers believe a reminder is in order, characters will explicitly refer to each other by name during a regular conversation, when this is rarely done in real life: "Say, Alice, how are you enjoying your coffee?" "Why, it's delicious, Bob, thanks for asking. How are you coming along, Carol?"

This is also quite common on medical drama shows like ER, Scrubs, and Greys Anatomy, where common medical phenomena and simple procedures must be explained to the unfamiliar audience. In most cases, this is achieved by explaining the disease or procedure to an intern or non-professional character.

On some shows, characters will As You Know in order to provide information that was already provided in a previous episode (that viewers might have missed) or even earlier in the show (for those who just tuned in), to the great annoyance of dedicated fans. (e.g. Just Tuned In: "Remember, Bob, you only have 20 minutes to defuse the bomb..." or Previous Episode: "Jane is really mad at you for running over her dog last week, isn't she?")

Solitary characters prefer to use "Here I am..." instead.

Although writers try to avoid this by using The Watson, using this trope is not always a bad thing. Not explaining anything sometimes results in the audience being too busy trying to figure out what's going on to enjoy the show.

Specific variants:

See also: Mr Exposition, The Watson, Expospeak, Captain Obvious.


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