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What makes a pesach (פסח) pasuch case qualify as sfeik sfeika? The shiur argues that sfeik sfeika isn't about resolving doubts through statistics, but about avoiding speculation entirely. When you need two assumptions to create a halachic problem, that's speculation—not a legitimate safek requiring stringency.
This deep analysis of Tosafos (תוספות) in Kesubos 9a explores the fundamental nature of sfeik sfeika in cases of pesach (פסח) pasuch (non-virginity found in a married woman). The shiur begins by examining Tosafos's famous question: if we assume most women who engage in relations do so willingly (rov rotzen), and we can use the legal presumption (chezkas heter) to assume it didn't happen during marriage (tachas), then why do we need sfeik sfeika at all? The Pnei Yeshua's answer—that chezkas haguf tells us it happened after age twelve when rov rotzen applies—creates further difficulties, as it seems to eliminate one of the required doubts for sfeik sfeika. Rabbi Zweig develops a novel approach to understanding sfeik sfeika that resolves these contradictions. Rather than viewing sfeik sfeika as a statistical calculation or method of resolving doubts, he argues it represents a fundamental halachic principle: we are not required to engage in speculation. When establishing a prohibition requires making two separate assumptions, that constitutes speculation rather than a legitimate safek. The Torah (תורה) obligates stringency for genuine doubts but not for fishing expeditions.
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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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