 This game captures David Hume's example of a boat with one oarsman on the port side and another on the starboard (provided we assume that Hume's oarsmen must make their choices between rest (D) and exertion (\(\bC\)) simultaneously). If either rows alone, she exerts herself to no good effect, which is worse than had she merely rested. Mutual cooperation here is identical to minimally effective cooperation and therefore is both an equilibrium outcome and a pareto optimal outcome. Games of this sort are discussed in section 8 below,  under the label “stag hunt.”