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From: gwyn@brl-vgr.ARPA (Doug Gwyn )
Newsgroups: net.math
Subject: Re: Prisoner's Dilemma
Message-ID: <1804@brl-vgr.ARPA>
Date: Fri, 11-May-84 07:10:37 EDT
Article-I.D.: brl-vgr.1804
Posted: Fri May 11 07:10:37 1984
Date-Received: Sat, 12-May-84 11:43:03 EDT
References: <1639@brl-vgr.ARPA>, <145@gloria.UUCP>
Organization: Ballistics Research Lab
Lines: 12

(Re: ScAm contest of PD playing programs)

Ah, but the true Prisoner's Dilemma game is played just once.  This is an
important technical point that can indeed affect one's strategy.

Note that the "cooperate at first, then do what the other player did
last round" strategy loses relative to the "use dominant pure strategy"
approach whenever there IS a dominant pure strategy (actually it might
tie if it gets lucky, but it cannot beat the pure strategy).

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