This market resolves to the year in which an AI system exists which is capable of passing a high quality, adversarial Turing test. It is used for the Big Clock on the 

, originally called the imitation game by Alan Turing in 1950, is a test of a machine's ability to exhibit intelligent behaviour equivalent to, or indistinguishable from, that of a human.

this Metaculus Question by Matthew Barnett, 

Longbets wager between Ray Kurzweil and Mitch Kapor. 

As of market creation, Metaculus predicts there is an ~

 that an AI will pass the Longbets Turing test before 2030, with a median community prediction of July 2028.

Manifold's current prediction of the specific Longbets Turing test can be found here:

This question is intended to determine the Manifold community's median prediction, not just of the Longbets wager specifically but of any similiarly high-quality test.

One or more human judges interview computers and human foils using terminals (so that the judges won't be prejudiced against the computers for lacking a human appearance). The nature of the dialogue between the human judges and the candidates (i.e., the computers and the human foils) is similar to an online chat using instant messaging. 

The computers as well as the human foils try to convince the human judges of their humanness. If the human judges are unable to reliably unmask the computers (as imposter humans) then the computer is considered to have demonstrated human-level intelligence.

This question refers to a high quality subset of possible Turing tests that will, in theory, be extremely difficult for any AI to pass if the AI does not possess extensive knowledge of the world, mastery of natural language, common sense, a high level of skill at deception, and the ability to reason at least as well as humans do. 

A Turing test is said to be "adversarial" if the human judges make a good-faith attempt, in the best of their abilities, to successfully unmask the AI as an impostor among the participants, 

 the human confederates make a good-faith attempt, in the best of their abilities, to demonstrate that they are humans. In other words, all of the human participants should be trying to ensure that the AI does not pass the test.

Note: These criteria are still in draft form, and may be updated to better match the spirit of the question. Your feedback is welcome in the comments.