Shabbat 131: Overriding Shabbat

Gezerah shavah again. The Omer sacrifice and the Shtei HaLechem sacrifice - both of which involve grinding of flour to prepare. Not all gezerah shavahs are created equal. Also: Not all mitzvot override Shabbat, but the following do: lulav, sukkah, matzah, shofar, brit milah. These inferences do not arrive at modern day halakhah, because the overriding sometimes applied only in the Temple. And a brief reflection on the challenges of this kind of daf.