
payoff -- payoff(s) / challenge(s) / game(s) / math(s) / plan(s) 
*
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..
--
@
media
/ idea(s)
/ change(s)
/ theme(s)
?
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:
/
]
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- prisoner(s) dilemma: T > R > P > S
- chicken: T > R > S > P
- free loader: R > T > S > P