SIMULATING GRICE: EMERGENT PRAGMATICS IN SPATIALIZED GAME THEORY
Patrick Grim
In Anton Benz, ed., Games, Decisions and Pragmatics III

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Figure 2
Conquest by All-Defect with a global assumption. Typical evolution of a randomized array of the 8 reactive Prisoner's Dilemma strategies, using global replacement: in each generation 5% of the array is replaced with the strategy of the most successful cell in the array.