The prescriptions of the leading eight.

The top row (X, Y) indicates the reputations of the donor and the recipient, respectively. For instance, (G, B) means the case where a good (G) donor meets a bad (B) recipient. The rules P, R1(C), R1(D) indicate the prescribed action, the assessment when cooperation (C) is observed, and the assessment when defection (D) is observed, respectively. The entry 1 means C or G, whereas 0 means D or B. The entries that are different from each other are highlighted in bold text. In the bottom row, the common prescriptions are shown, where * means that the entry is arbitrary and † means that the entry is determined according to R1(B, B, C) and R1(B, B, D). These norms are CESS for b/c > 1 in the rare error limit.

表格首行的(X, Y)分别对应捐赠者与接收者的声誉状态。例如，(G, B)代表优质（G）捐赠者与劣质（B）接收者构成的配对场景。规则P、R1(C)与R1(D)分别指代预设行为、观测到合作（C）时的评估结果，以及观测到背叛（D）时的评估结果。表项1对应C或G，表项0则对应D或B。存在差异的表项以粗体标注。表格末行展示通用预设规则，其中符号*代表该表项为任意取值，符号†代表该表项需依据R1(B, B, C)与R1(B, B, D)确定。在罕见错误极限条件下，当b/c>1时，此类规范均为演化稳定策略（CESS）。