PHL 204-07

    Prisoner’s Dilemma:

  • 2 suspects, A and B
  • police arrest them with enough evidence to convict for 1 minor burglary
  • police sure that these people are responsible for more
  • separated into 2 separate rooms
  • if you confess but partner does not, you are released, partner convicted
  • simultaneous offer, same to each
  • both confess, 5 years each
  • neither confess: 1 year each
Prisoner’s Dilemma B confesses B doesn’t confess
A confesses A=5 yr
B=5yr
A=0 yr
B=20 yr
A doesn’t confess A=20 yr
B=0 yr
A=1 yr
B=1 yr
    From A’s perspective:

  • B will either confess or not
  • if B confesses, the best for me is to confess (5 < 20)
  • if B does not confess, the best for me is to confess
  • therefore I should confess it is better for me to do so
  • From B’s perspective:

  • use structurally identical to this one and arrive at same conclusion
  • both confess, getting 5 years instead of 1
  • this shows need for cooperation: pact, agreement, covenant (equal share/justice by law)
  • Ring of Gyges

    Callicles believes that the superior should not follow these agreements; by nature they should take what they want. Socrates ask what is meant by superior.

    • superior = stronger?
    • superior = more intelligent?
    • superior = wanton
      • strong desires
      • never fight them
      • get them satisfied
      • get new desires
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