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Turing Test
For this test, you need to have higher than C++ to pass.

A computer would deserve to be called intelligent if it could deceive a human into believing that it was human.

In computer science, a Turing Test is a computer's attempt to demonstrate human intelligence. It's a test of an AI's quality, usually by carrying through a conversation with a user by text-only chat. If the user can't reliably tell the difference between the AI and another user chatting the same way, the AI passes. At heart, the Turing Test is a machine attempting to prove it is a human. Comedic extensions of the test may include persuading the tester that the other test-ee is the AI, or that they themselves are the AI.

In the world of science fiction, this test becomes Serious Business for the machines involved. In worlds with Ridiculously Human Robots and Artificial Humans, this test is useful for determining who is flesh and blood, and who is steel and silicon.

The test relies on the inherent differences between an AI and a real human mind. It can involve asking questions only a human being would be able to answer, such as ruminating on matters of emotion and love. It might also involve resolving paradoxes and handling concepts other machines would be unable to compute. Conversely, it can also be used to determine if a given character is NOT human, either by failing the test, or by its inverse. For example, in works with a Robot War, the Turing Test is useful in keeping the evil robot army from infiltrating the base of La Résistance and killing all humans, or it can be used to fool said robot army into letting the meatbag walk in freely.

A subtrope of Artificial Intelligence. This trope can appear at all ends of the Sliding Scale of Robot Intelligence, but tends to appear at the higher end, where the 'bots will be more human-like. Those who pass the Turing Test may have undergone Mechanical Evolution, or something as simple as being struck by lightning.


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  • Johnny 5 receives one in the late second act of Short Circuit, proving to Newton that he is indeed alive.
  • The Voight-Kampff test from Blade Runner is a Turing Test combined with a lie detector.
  • David manages to pass a sort of unofficial test in A.I.: Artificial Intelligence when he's captured for the Flesh Fair and slated to be destroyed in front of a crowd. However, when he's brought in front of the crowd, his pleading for his life manages to convince them that he's a real boy about to be killed and he manages to escape in the confusion.

  • The final dialogue in Douglas Hofstadter's Gödel, Escher, Bach plays this straight and subverts it, using a heavy dose of Recursive Reality.
  • Subverted In Robert J Sawyer's WWW Trilogy, where an AI emergent from mutant web packets with a damaged time-to-life counter is proven to be intelligent on account of how it *fails* the Turing test.
    • More accurately, it proved that it/he actually was an AI rather than a human with a really good internet connection who was up to something. The AI in The Terminal Experiment and Mindscan pass automatically, since they are copies of human minds.
  • Used in The Diamond Age by the protagonist, using poetry to determine if the interlocutor was human or not.

    Live Action TV 
  • Person of Interest: The Machine passes with flying colors when it creates "Ernest Thornhill," a convincing human persona, and impersonates Pennsylvania Two, issuing orders to various government departments to relocate its servers away from Hanford.

    Newspaper Comics 

    Video Games 
  • In the BioShock 2 DLC "Minerva's Den", the player character Subject Sigma's Mission Control is Charles Milton Porter, a genius scientist who actually worked with Turing in Bletchley Park prior to his invitation to Rapture. While working on Rapture's Master Computer "The Thinker", he sought to make it "think for itself" and more importantly actually mimic human personalities, in particular that of his deceased wife. He makes great strides in that regard (which prompts him to remark "If only Turing could see me now...") and eventually succeeds but eventually turns off the program because it just "isn't her". Shortly after the player learns this, he also learns that in a way, he has been part of a Turing Test all along: Sigma IS Porter and the "Porter" that has been guiding you all this time was The Thinker mimicking Porter's personality.
  • In Metal Gear Solid: Peace Walker, Peace Walker's AI, BS-Imago, is 'the world's first Turing Test capable AI'. It's an AI based on the mind of The Boss created by a student of Alan Turing. In the beginning of the game, we hear a recording of its creator giving it a Voight-Kampff Test-like scenario in order to check its capacity for humanlike thinking.

    Web Comics 
  • Act 6 of Homestuck introduces a new character who makes up an auto-responder program that is almost indistinguishable from himself, referencing the test indirectly.
    • He makes a good case for his own personhood shortly thereafter, seemingly passing the test. However he's not perfect, and is still prone to glitches.
  • This xkcd strip gives the machine bonus points for making the examiner believe himself to be a machine also.
  • An early arc of PvP had a researcher giving his chatbot an improvised Turing test by putting it on the internet under an alias. Francis was fooled into thinking he was talking to a real girl.
  • In S.S.D.D the first version of the Oracle bluffed its way past the Turing test by saying random stuff when confused like "I say, are you implying that I enjoy bum sex with other men?"
  • In Freefall, Florence asks two robots, "What does my name smell like?" The first dismisses the question as nonsense. The second, after wondering if it's being tested or on a reality TV show, concludes that without a sense of smell, it can't be sure names don't have scents.
  • Referenced in Megatokyo when Junpei declares that a robot has a real brain when zombies can't tell the difference.

    Web Original 

    Western Animation 
  • Inverted twice in Futurama:
    • A "reverse Turing Test" is administered when Bender has switched bodies with Amy and has to prove he's a robot.
    • In season 1's "Fear of a 'Bot Planet", Fry and Leela wind up on a planet ruled by antihuman robots, but successfully impersonate robots.
    Guard 2: Administer the test.
    Guard 1: Which of the following would you prefer: A — a puppy, B — a flower from your sweetie, or C — a large, properly formatted data file? Choose!
    Fry: Is the puppy mechanical in any way?
    Guard 1: No! It is the bad kind of puppy!
    Leela: Then we'll go with that data file.
    Guard 1: Correct.
    Guard 2: The flower would have also been acceptable.

    Real Life 
  • A basic kind of Turing Test is those annoying CAPTCHA widgets to prevent spambots. The acronym stands for "Completely Automated Public Turing test to tell Computers and Humans Apart".
  • The test gets its name from its inventor Alan Turing, the cryptanalyst/computer scientist from World War II who broke the Nazis' Enigma code and helped lay the groundwork for modern computers.
    • Interestingly, this doesn't so much test intelligence, but similarity to humans; it tests how well the computer can pretend to be a human rather than whether it can solve problems as well as one. As a closeted homosexual living in a place where such conduct was illegal, the idea of pretending to be something he was not would have been close to his heart.
  • The philosopher John Searle created the concept of the "Chinese Room" to suggest that the Turing test is ineffective at determining intelligence. Basically, it posits that even if a computer knows what response to make to a human, it doesn't understand the meaning of the responses it gives. The argument is almost universally held to be either a logical fallacy or completely incoherent, as holding an actual conversation convincingly without any meaning is demonstrably impossible... thus proving the usefulness of the test.
  • David Fogel, creator of the checkers neural learning AI Blondie24 in a presentation rejected that the Turing Test is accurate method of testing (he was asked about it by one of the audience). While letting the AI play online, people actively were trying to talk to it as if it were a real person, despite Fogel's team nor the AI itself doing nothing in response.
  • A chatbot program named "Eugene" just barely passed a Turing test in June 2014, but many hold that he cheated by pretending to be a 13-year old Ukrainian boy who barely spoke English.
  • The test itself is designed on its surface to test computer intelligence by comparing it to that of an average human. However, there are two main problems with this:
    • Some intelligent behaviors are not human. A computer can easily solve well-defined mathematical problems in a fraction of the time that the most intelligent human mind could. But actually doing so would easily reveal the subject to be a computer and so it would fail the test.
    • Some human behaviors are not intelligent. The best performing Turing test programs achieve their results by simulating fallible human behavior. Computers can type instantaneously and with flawless spelling, but delaying responses and adding typos here and there can make it seem more human, and thus more likely to pass the test.

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