The ExtremeProgrammingMaturityModel:
	* Level -2: You couldn't care because you've never heard of it.
	* Level -1: You are considering XP and beginning to care about your level of attainment.
	* Level 0: You work according to the practices in ExtremeProgrammingExplained.
	* Level 1: You have evolved away from those practices based on your experience.
	* Level 2: You no longer care what level you have achieved.

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Compare to the ThreeStagesInJeetKuneDo