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  1. ...dominant strategies is the NE. Say there are cooperators and cheaters. Cooperator pair with another cooperator would yield a payoff...

  2. helper, acolyte, auxiliary, second, man Friday, girl Friday, henchman, right hand, right-hand man,comrade,companion,helpmate,help-meet,co-worker,consort,confrere,sidekick, cooperator , collaborator, follower, adjunct, gopher, aide, deputy, attendant