No community start suggestion yet.
Why doesn't the woman have a migus to say 'lo nivalti' when witnesses saw yichud? Tosfos develops that according to Rav Yehoshua, ma'alos hayuchsin means no safek can remain unresolved - even migus cannot work where doubt exists in matters of lineage.
This shiur provides an extensive analysis of a complex Tosfos on Kesubos 13b dealing with the principles of migus (legal presumption) and ma'alos hayuchsin (elevated standards for lineage matters). The Gemara (גמרא) presents a fundamental question: when witnesses see a woman in yichud (seclusion) and she claims she was mezanah with a kosher person, why doesn't she have a migus to say she wasn't mezanah at all (lo nivalti)? Tosfos addresses several layers of this question. First, he establishes that according to Rav Yehoshua, when she says 'lakosher nivalti' (I was mezanah with a kosher person), she's not believed because it constitutes one safek, and Rav Yehoshua holds that ma'alos hayuchsin requires absolute certainty. The shiur explores why the standard migus logic doesn't apply here - normally, if someone could have made a better claim (lo nivalti), we believe their current claim.
Looking for the full summary?
Full access is available to members of the TUF Alumni Association or the Yam Hagadol Foundation.
Already a member? Let the admin know!
Dedicate a Shiur in Gemara
L'ilui nishmas a loved one. In honor of a simcha or yahrzeit. As a zechus for a refuah sheleimah. Your dedication helps carry Rabbi Zweig's Torah to learners around the world.
Why does halacha forbid entering dangerous places if everything happens by Divine decree? The shiur examines the debate between Rashi and Tosfos on traveling at night, developing a fundamental distinction: Rashi holds one must avoid even deserved punishments that Hashem delays through mercy, while Tosfos holds the prohibition addresses self-inflicted harm through free will. This framework reveals how people rationalize self-destructive behavior as "hashgacha."
Why does the Gemara praise hospitality to scholars as a unique mitzvah rather than ordinary hachnasas orchim? The shiur distinguishes two mitzvahs: hachnasas orchim (providing for those in need) and connecting to talmidei chachamim (cleaving to God through scholars). Yisro's meal for the Jewish leaders wasn't charity—it was his way of bonding with those transformed by Torah, teaching that learning must fundamentally change who we are.
Kesubos 13b
Looking for the full transcript?
Full access is available to members of the TUF Alumni Association or the Yam Hagadol Foundation.
Already a member? Let the admin know!
