The program, known as ELIZA, worked by examining a user's typed comments for keywords.
If a keyword is found, a rule that transforms the user's comments is applied, and the resulting sentence is returned.
The "standard interpretation" of the Turing Test, in which player C, the interrogator, is given the task of trying to determine which player – A or B – is a computer and which is a human.
The evaluator would be aware that one of the two partners in conversation is a machine, and all participants would be separated from one another.
The conversation would be limited to a text-only channel such as a computer keyboard and screen so the result would not depend on the machine's ability to render words as speech.
(Huma Shah argues that this two-human version of the game was presented by Turing only to introduce the reader to the machine-human question-answer test.
We now ask the question, "What will happen when a machine takes the part of A in this game?
Turing's paper considered nine putative objections, which include all the major arguments against artificial intelligence that have been raised in the years since the paper was published (see "Computing Machinery and Intelligence").