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Why does bitul chametz apply to crumbs that aren't significant enough to require searching? The shiur analyzes the Gemara (גמרא)'s answer that crumbs become hefker through bitul, creating a mechanism where chametz exits one's domain for bal yeira'eh purposes while maintaining the owner's responsibility until properly nullified.
This shiur analyzes a difficult passage in Pesachim 6b that asks why the Gemara (גמרא) states 'haboidek tzerach shivato' (one who searches needs to nullify) if the reason for nullification is merely crumbs (perurin). The fundamental question is: if crumbs don't require searching because they aren't chashuv (significant), why should they require nullification? Rashi (רש"י)'s explanation is examined in detail, particularly his seemingly disorganized presentation that begins with nullification being 'belibo' (in the heart), shifts to timing ('samuch lebedeka miyad'), then returns to the verbal declaration required. The Rav questions this structure and seeks to understand the underlying logic.
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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."
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Pesachim 6b
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