Archive for February 3rd, 2017

February 3, 2017

Prisoner’s Dilemma

reciprocal altruism

The prisoner’s dilemma (PD) is a paradox about co-operation. It shows why two ‘rational’ individuals might not co-operate, even if it seems in their best interests. It is studied in game theory.

In the classic example two people are arrested for a crime, and the police are uncertain which person committed the crime, and which person abetted the crime. If each remains silent, they are both soon released. If one betrays the other, the betrayer goes free, and the other is imprisoned for a long time. If each betrays the other, they both are held for a short time. No matter what happens, they will never see each other again.