structural:summarization
Omissions

Nissim ben Jacob 's Hakdamah Le'mafteach Hatalmud argued that it was unnecessary for "Judah the Prince" to discuss them as many of these laws were so well known. Margolies suggests that as the Mishnah was redacted after the Bar Kokhba revolt, Judah could not have included discussion of Hanukkah, which commemorates the Jewish revolt against the Seleucid Empire (the Romans would not have tolerated this overt nationalism). Similarly, there were then several decrees in place aimed at suppressing outward signs of national identity, including decrees against wearing tefillin and tzitzit; as conversion to Judaism was against Roman law, Judah would not have discussed this.