Zevachim 38 - October 22, 30 Tishrei

The Gemara brings a braita in which a Tanna offers an alternative interpretation to explain Beit Hillel's reasoning - that one application of blood in the sin offering is sufficient to fulfill the obligation, rather than two. Two objections are raised against this interpretation, and in the second objection, an alternative drasha is proposed. However, both objections are ultimately resolved. If, according to Beit Shammai, pigul applies only when the improper intent occurs during two applications of blood (in a sin offering), whereas according to Beit Hillel even one is sufficient, the question arises: why is this ruling not listed among the leniencies of Beit Shammai? Rabbi Yochanan and Rav Pappa enumerate various laws in which the three non-essential applications of blood are similar to or different from the one essential application.