The costs of and returns from actions are varied and individually concrete dimensions, combined in heterogeneous ways. The many needs of the body also fluctuate. Making action selection efficiently track some ultimate goal, whether fitness or another utility function, itself requires representational abstraction. Therefore, predictive brains need abstract value representations.

中文翻译：

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抽象奖励

行动的成本和回报是不同的，具体的维度，以不同的方式组合在一起。身体的许多需求也会波动。使动作选择有效地跟踪某个最终目标，无论是适应度还是其他效用函数，本身就需要表示抽象。因此，预测大脑需要抽象的价值表示。