My theory was that Jerry Seinfeld and Larry David were involved at one time in something very shady, and that they created the "Seinfeld" TV show as part of a plot to protect themselves in the case their past activities came to light.
Consider that the show "Seinfeld" is about a comedian named "Jerry Seinfeld", and the part was played by the real Seinfeld. The character Seinfeld's best friend was George Costanza, and it was well known that he was based on Larry David, and that many of the things George did on the show were based on real-life Larry David incidents.
Note that a few years into the show, character Seinfeld and his best friend get a chance to write a pilot for NBC for a show called "Jerry" about a comedian named Jerry Seinfeld and based on the life of character Jerry Seinfeld, and that included characters based on the character Jerry's friends.
Then, after Seinfeld ended, Larry David went on to make "Curb Your Enthusiasm" for HBO, a show about a character named Larry David who was a comedian and was the Seinfeld co-creator, and real life Larry David played character Larry David. Much of the incidents in CYE were based on real-life Larry David incidents.
These two shows, especially Seinfeld when it went down the recursion rabbit hole with "Jerry", seem designed to blur the line between fictional Jerry Seinfeld and real life Jerry Seinfeld, and between fiction Larry David and real life Larry David.
It's well known that human memory is malleable. If you remember something fairly accurately, but then you hear someone else's recollection of the same event and their recollection differs, your memory can change to better reconcile your account and their account. (This can be a big problem in criminal justice matters...it is not hard for an interviewer to alter the memory of a witness by phrasing questions in a way that suggest something at odds with what the witness remembers).
So my theory was that the purpose of the Seinfeld and CYE shows was for Seinfeld and David to present alternate versions of themselves and of incidents they had been involved in many years earlier to reshape the memories of others who witnessed those incidents, to get them to forget or doubt something that Seinfeld and David did that would be very embarrassing or damaging to their careers if it came to light.
I would add some comment but I don't want to spoil it to people that never heard of it.
It's just worth a reading :)
https://www.reddit.com/r/finlandConspiracy/comments/2y0oog/t...
It's about as silly as most of the commonly cited responses, and yet oddly cute.
An excerpt from the first Google result regarding the term:
Most people have built in "slides" that short circuit the mind’s critical examination process when it comes to certain sensitive topics. "Slides" is a CIA term for a conditioned type of response which dead-ends a person’s thinking, and terminates debate or examination of the topic. For example, the mention of the word "conspiracy" usually solicits a slide response with many people. -Fritz Springmeier, author of The Top 13 Illuminati Bloodlines and de-programmer
See the first youtube video.