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23. Ethics / B. Contract Ethics / 7. Prisoner's Dilemma

[situations where being rational brings failure]

3 ideas
The first performer in a contract is handing himself over to an enemy [Hobbes]
     Full Idea: He which performeth first in a contract, does but betray himself to his enemy.
     From: Thomas Hobbes (Leviathan [1651], 1.14)
Two prisoners get the best result by being loyal, not by selfish betrayal [Poundstone]
     Full Idea: Prisoners A and B can support or betray one another. If both support, they each get 1 year in prison. If one betrays, the betrayer gets 0 and the betrayed gets 3. If they both betray they get 2 each. The common good is to support each other.
     From: William Poundstone (Prisoner's Dilemma [1992], 06 'Tucker's')
     A reaction: [by Albert Tucker, highly compressed] The classic Prisoner's Dilemma. It is artificial, but demonstrates that selfish behaviour gets a bad result (total of four years imprisonment), but the common good gets only two years. Every child should study this!
The tragedy in prisoner's dilemma is when two 'nice' players misread each other [Poundstone]
     Full Idea: The tragedy is when two 'nice' players defect because they misread the other's intentions. The puzzle of the prisoner's dilemma is how such good intentions pave the road to hell.
     From: William Poundstone (Prisoner's Dilemma [1992], 11 'Howard's')
     A reaction: I really wish these simple ideas were better known. They more or less encapsulate the tragedy of the human race, with its inability to prioritise the common good.