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When does a mother's chazakah help her daughter (ches kasah mahani labas)? The shiur analyzes Tosfos on the distinction between cases where we don't know the father's identity versus where the father is a safek. The Chasam Sofer's novel position that even after beis din validates the mother's status, her future children can still be safek chalalim.
This shiur explores a fundamental question in hilchos kehuna regarding when a mother's chazakah (presumptive status) can help establish her daughter's kashrus for marrying a kohen. The Gemara (גמרא) discusses the principle of 'ches kasah mahani labas' - that a mother's chazakah should benefit her daughter - but shows cases where this doesn't apply. Rabbi Zweig analyzes Tosfos who distinguishes between different scenarios. In the classic case of 'manda machshir ba machshir bebita,' we don't know who the father was, so the mother's chazakah can establish that he was kosher, which benefits the daughter as well. However, in the current sugya where we know the father is a safek (possibly a challal), the mother's chazakah cannot help establish his status - we know he's questionable.
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Kesubos 14a
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