Sanhedrin 100 - March 27, 27 Adar

What is the definition of an apikoris? Several suggestions are brought, mainly related to one who does not treat the rabbis with the proper respect as it undermines belief in rabbinic Judaism. What is the definition of sefarim chitzoniyim, external literature, that if one reads them, one does not get a portion in the World-to-come, according to Rabbi Akiva? A braita says it is book of the Saducees. Rav Yosef says it is the book of Ben Sira. Abaye tries to understand what is wrong with learning it since many of the ideas there appear in the Tanach or in rabbinic thought.