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Why can't we use chazakas heter lekula to permit an eshes kohen whose virginity was lost at an unknown time? The shiur develops a fundamental distinction that chazakah tells us "nothing happened," not "when something happened." Since we know something occurred, using chazakah requires determining timing—but conflicting chazakos about timing cancel each other out.
This shiur analyzes a complex Tosafos (תוספות) on Kesubos 9a dealing with the case of an eshes kohen whose virginity was lost at an unknown time. The Gemara (גמרא) presents a safek: did she lose her besulos before marriage (making her forbidden to a kohen) or after (which would be permitted)? Tosafos asks why we cannot apply chazakas heter lekula to permit her. The shiur examines multiple interpretations of Tosafos' approach. One reading suggests that by an eshes kohen, there is only one safek rather than a safek safek, making the case stricter. Another possibility is that chezkas haguf (the assumption that her physical state didn't change) overrides chezkas heter lekula, making her definitively forbidden.
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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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Kesubos 9a
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