Bava Batra 160 - 2nd Day of Rosh Chodesh - December 2, 1 Kislev

The tenth chapter begins with a comparison between two different types of documents - a regular one ( pashut) and one that has folds ( mekushar ). The differences include the number of witnesses required and where they sign. Several verses are brought to find a source for these two documents and their differences in the Torah and in Yirmiyahu. However, since these verses can be explained in another manner, the Gemara concludes that these differences are rabbinic and are merely connected to verses as an asmachta . The get mekushar was instituted in a particular place where many kohanim lived who were known to be short-tempered and would decide in a moment of anger to divorce their wives. Since kohanim cannot remarry their wife after divorcing her, the rabbis instituted a takana that the kohanim would need to give their wives a get mekushar , which is very time-consuming. This would buy time so they could calm down from their anger and hopefully decide not to divorce their wives. Rav Huna and Rav Yirmia bar Abba debate where the witnesses sign on a get mekushar , either between the folds or on the back of the document opposite the writing. Rami bar Hama asked about Rav Huna's opinion, why are we not concerned that someone will add words to the text below after the witnesses sign.