The Chewbacca defense is a legal strategy used in episode 27 of South Park, "Chef Aid", which premiered on October 7, 1998, as the fourteenth episode of the second season. The aim of the argument is to deliberately confuse the jury by making use of the fallacy known as ignoratio elenchi (or a red herring). The concept satirised attorney Johnnie Cochran's closing argument defending O. J. Simpson in his murder trial.
In the satire's original defense, the fictional Cochran started by stating, incorrectly, that Chewbacca lives on the planet Endor. After then noting that this statement "does not make sense", Cochran continues to connect the senselessness of his own statement to the actual case, implying that it is equally senseless. His closing argument "If Chewbacca lives on Endor, you must acquit" is lampooning the actual Cochran's original "If it doesn't fit, you must acquit".
In the episode, Chef contacts a "major record company" executive, seeking only to have his name credited as the composer of "Stinky Britches". Chef's claim is substantiated by a 20‑year-old recording of Chef performing the song.
The record company refuses, and furthermore hires Johnnie Cochran, who files a lawsuit against Chef for harassment. In court, Cochran resorts to his "famous" Chewbacca defense, which he "used during the Simpson trial", according to Chef's lawyer, Gerald Broflovski. Although Broflovski uses logic, reasoning and the fact that Chef properly copyrighted his work, he is then followed by Cochran:
- ...ladies and gentlemen of this supposed jury, I have one final thing I want you to consider. Ladies and gentlemen, this is Chewbacca. Chewbacca is a Wookiee from the planet Kashyyyk. But Chewbacca lives on the planet Endor. Now think about it; that does not make sense!
- Gerald Broflovski
- Damn it! ... He's using the Chewbacca defense!
- Why would a Wookiee, an 8-foot-tall Wookiee, want to live on Endor, with a bunch of 2-foot-tall Ewoks? That does not make sense! But more important, you have to ask yourself: What does this have to do with this case? Nothing. Ladies and gentlemen, it has nothing to do with this case! It does not make sense! Look at me. I'm a lawyer defending a major record company, and I'm talkin' about Chewbacca! Does that make sense? Ladies and gentlemen, I am not making any sense! None of this makes sense! And so you have to remember, when you're in that jury room deliberatin' and conjugatin' the Emancipation Proclamation, does it make sense? No! Ladies and gentlemen of this supposed jury, it does not make sense! If Chewbacca lives on Endor, you must acquit! The defense rests.
This penultimate statement is a parody of Johnnie Cochran's closing arguments in the O. J. Simpson murder case where he states to the jury: "If it doesn't fit, you must acquit!" in reference to an earlier point in the trial when prosecutor Christopher Darden asked Simpson to try on a bloody glove found at the murder scene and the glove turned out to be too small for Simpson to put on easily over latex surgical gloves Simpson put on just before.
Similarly, in the episode, Cochran's defense is successful and the jury finds Chef guilty of "harassing a major record label", after which the judge sets his punishment as either a $2 million fine to be paid within 24 hours or, failing that, four years in prison (the judge initially sentences him to eight million years before being corrected by a court officer).
Ultimately, a "Chef Aid" benefit concert is organized to raise money for Chef to hire Johnnie Cochran for his own lawsuit against the record company. At the concert, Johnnie Cochran experiences a change of heart and offers to represent Chef pro bono. He again successfully uses the Chewbacca defense, this time to defeat the record company and make them acknowledge Chef's authorship of their song. In the second use of the Chewbacca defense, he ends by taking out a monkey puppet and shouting, "Here, look at the monkey. Look at the silly monkey!" causing a juror's head to explode.
Criminologist Dr. Thomas O'Connor says that when DNA evidence shows "inclusion", that is, does not exonerate a client by exclusion from the DNA sample provided, "About the only thing you can do is attack the lab for its (lack of) quality assurance and proficiency testing, or use a 'Chewbacca defense' … and try to razzle-dazzle the jury about how complex and complicated the other side's evidence or probability estimates are." Forensic scientist Erin Kenneally has argued that court challenges to digital evidence frequently use the Chewbacca defense by presenting multiple alternative explanations of forensic evidence obtained from computers and Internet providers to raise the reasonable doubt understood by a jury. Kenneally also provides methods that can be used to rebut a Chewbacca defense. Kenneally and colleague Anjali Swienton have presented this topic before the Florida State Court System and at the 2005 American Academy of Forensic Sciences annual meeting.
The term has also seen use in political commentary; Ellis Weiner wrote in The Huffington Post that Dinesh D'Souza was using the Chewbacca defense in criticism of then new Speaker of the House Nancy Pelosi, defining it as when "someone asserts his claim by saying something so patently nonsensical that the listener's brain shuts down completely".
See also 
- Argument from authority
- Big Lie, a propaganda tactic whereby an absurd statement is made with such conviction that the listener accepts it to be true, because it is counterintuitive for a normal person to make such an audacious statement without fear of being caught
- Enthymeme for an analysis of Cochran's logic
- Fear, uncertainty, and doubt
- Idiot defense
- King Kong defense
- Non sequitur
- Price of eggs, an expression which is used to denote something which is unrelated to the current topic of discussion
- Reductio ad absurdum, disproof by an absurd conclusion
- Reverse psychology
- The Matrix defense
- Twinkie defense
- Video of the scene is available.
- "CNN Interactive: Video Almanac - 1995".
- "Cochran was rare attorney turned pop culture figure". Associated Press. March 30, 2005. Retrieved 2007-01-27.
- Thomas O'Connor, Ph.D., Austin Peay State University Center at Ft. Campbell and North Carolina Wesleyan College. "DNA Typing and Identification". Archived from the original on 2006-10-09. Retrieved 2007-01-27.
- Erin Kenneally, M.F.S., J.D. "Applying Admissibility, Reliability to Technology". Florida State Courts. Archived from the original on 2006-12-07. Retrieved 2007-01-27.
- Anjali R. Swienton, M.F.S., J.D. Erin Kenneally, M.F.S., J.D. "Poking the Wookie: the Chewbacca Defense in Digital Evidence Cases". SciLaw Forensics, Ltd. Retrieved 2007-01-27.
- "Upcoming AAFS Annual Meeting". CERIAS, Purdue University. Retrieved 2007-01-27.
- Ellis Weiner (January 24, 2007). "D is for Diabolical". The Huffington Post. Retrieved 2007-01-27.
- Heinrichs, Jay (2007). Thank You for Arguing: What Aristotle, Lincoln, and Homer Simpson Can Teach Us About the Art of Persuasion. New York: Three Rivers Press. pp. 148–49. ISBN 978-0-307-34144-0.
Further reading 
- Arp, Robert (December 2006). "The Chewbacca Defense: A South Park Logic Lesson". In Arp, Robert. South Park and Philosophy: You Know, I Learned Something Today. Blackwell Publishing. ISBN 978-1-4051-6160-2.
- Chewbacca defense on tvtropes - tvtropes.org
- The Chewbacca defense as seen in the episode - southparkstudios.com