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How can witnesses testify about sotah when they didn't actually see the forbidden act? Tosafot challenges Rashi (רש"י)'s position using the principle "hein hein eidei yichud hein hein eidei bi'ah." The shiur explores whether witnesses need eidei kiyum (who create the prohibition) versus eidei birur (who merely clarify existing facts).
This shiur analyzes a fundamental disagreement between Rashi (רש"י) and Tosafot regarding the nature of testimony in cases of suspected adultery (sotah). The discussion centers on Kesubos 9a and the question of whether witnesses can testify when they observed seclusion (yichud) but not the actual transgression (bi'ah). Tosafot raises a powerful challenge to Rashi using the principle "hein hein eidei yichud hein hein eidei bi'ah" - the same witnesses who testify about seclusion also testify about the forbidden act. This principle works in cases of kiddushin where witnesses know the purpose of the seclusion, but Tosafot questions how it applies when witnesses have no knowledge of what actually occurred.
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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 9a
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