NUM221 The Talmud includes many fractious disputes, in which virtually anything could be questioned, but there were some limits to this general picture of uninhibited debate. When the Sanhedrin existed, rabbis could challenge decisions in debate, even vigorously, but in practice they had to conform to the Sanhedrin’s majority ruling. (Compare, for example, M. Rosh Hashanah 2:8-9.) Furthermore, there were rules of propriety concerning how the debates themselves should be held with colleagues, and, all the more so, with teachers or parents. B. Kiddushin 29a-b, 40b; later codified in, for example, Arukh Hashulhan, Yoreh De’ah 240:12.) So, for example, rabbinic sources strive to differentiate the high level of dissent to which the Rabbis were accustomed and which they thought healthy from that of the biblical figure Korah, whose rebellion the Torah condemns. Korah’s dissent the Rabbis said, was not “for the sake of Heaven” but rather for his own power and love her victory, whereas the disputes of Hillel and Shammai were for the sake of Heaven -- that is, to identify God's will. Because that was the case, rabbinic disputes will continue for all time, but Korah’s dispute died with him. (Numbers 16:1-35). Thus disputants must argue for the right reasons while following the practice determined by the majority. These rules were enforced, for rabbinic literature speaks of Jews whose mode of dissent led the community to exclude them. These include the min (sectarian) and the apikoros (heretic). In view of the wide latitude of rabbinic debate, one can understand why there is considerable discussion in classical and contemporary literature about exactly what these people held or did that made their modes of dissent unacceptable. Rashi (1040-1105), for example, said that one feature of admissible debate is that “Neither side of the conflict cites an argument from that or of another god, but only from the Torah of our God.” (Rashi on B. Hagigah 3b, s.v. “kulan.”) In addition to such individuals, there have been groups that splintered off from the Jewish people. These include Christians, Hebrew Christians (who existed from the first through the fifth centuries), Karaites (from the eighth century to the present), and Sabbetaians (in the late seventeenth and early eighteenth). Thus, with all their commitment to pluralism, rabbis throughout the centuries have drawn some clear lines defining acceptable method and content.