Remaining in the medical field, Parry simulated the behavior of a person with paranoid schizophrenia. It was developed in 1972 by psychiatrist Kenneth Colby as a practice tool for his students before they could deal with real patients.

In a slight variation of the Turing test, psychiatrists were asked to read Parry's transcripts and those of real patients to distinguish which of the two they came from. It was an incredible result for that time; the psychiatrists managed to identify a difference in the behavior only 48 percent of the time.

In January 1973, as a demonstration during an international computer conference, computer science pioneer Vint Cerf decided to take bots to their logical conclusion. Using ARPANET, he set up a conversation between Eliza and Parry. It was a bicoastal meeting of the computer minds; Eliza was based at MIT and Parry at Stanford. The following is a brief excerpt of the conversation between the two bots:

• Eliza: Good Evening. Tell me your problems. Please terminate input with a period or a question mark.
• Parry: People get on my nerves sometimes.
• Eliza: I am not sure I understand you fully.
• Parry: You should pay more attention.
• Eliza: Suppose you should pay more attention.
• Parry: You're entitled to your own opinion.
• Eliza: What makes you think I am entitled to my own opinion?
• Parry: It bothers me just to be around people in general.
• Eliza: Please go on.
• Parry: I went to the track at Bay Meadows a while back.
• Eliza: What does that suggest to you?
• Parry: I went to the races.