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How does chezkas haeim (presumptive status of the mother) work to determine if her child is kosher for kehuna or kahal? The shiur argues that disqualification from kehuna comes through the mother's status, not directly from the father. This reframes the entire sugya - even when we can't determine who the father is, if the mother retains her kosher status through chazakah, the child cannot be disqualified.
This shiur provides an in-depth analysis of the Gemara (גמרא) in Kesubos 13b regarding chezkas haeim mehani labas (the presumptive status of the mother helps the child). The central question is how a mother's chazakah can help determine her child's eligibility for kehuna or kahal when there is uncertainty about the father's identity. Rav Kil Vegar's approach distinguishes between cases of rov posul (majority unfit) versus rov kasher (majority fit). He suggests that when there's rov posul, the mother loses her chazakah and becomes posul, which then affects the child. However, when there's rov kasher, the mother remains kosher and this helps the child. Rabbi Zweig raises fundamental questions about this approach - if chazakah tells us something definitive about who she was with, then statistical majorities shouldn't matter at all.
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Kesubos 13b
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Why does the Gemara present a kal v'chomer for chuppah making kiddushin based on kesef not being maichel b'terumah, only to reject it? The shiur reveals that even the rejected kal v'chomer establishes a fundamental yesod: kiddushin is a kinyan for ishus (marital relationship), not merely a kinyan in hilchos kinyanim. The second kal v'chomer—from chuppah being gomeres—raises Tosafos's famous question.
Is the kesef used in kiddushin a true kinyan (acquisition), or merely a symbolic means of establishing marriage? The shiur analyzes multiple interpretations of the Gemara's derivation from ki yikach ki'ach mi'Sayeffron, exploring whether marriage constitutes ownership, and develops three fundamental approaches: (1) The Gemara proves ishus is a kinyan, (2) ishus is not a kinyan but uses kinyan-like means, or (3) ishus is a kinyan but the kesef may not be a ma'aseh kinyan. The Rambam's position—calling kesef "midivrei sofrim"—is explained as distinguishing between cross-referencing concepts versus borrowing terminology.
Why does the Mishna alternate between the language of "kinyan" (acquisition) and "kiddushin" (sanctification) when describing marriage? The shiur develops a fundamental distinction: marriage has two separate aspects—a kinyan dimension (ownership) and a kedusha dimension (sanctified relationship). Either aspect can initiate the bond, and understanding this dual nature resolves multiple textual and halachic questions throughout the sugya.
Does kiddushei shetar require a shevah pruta? The Ran presents two approaches to the Rif's position. The shiur develops the Ran's second pshat that shetar kiddushin functions as a hachnah (exchange) rather than a mere kinyan nesina. This reading has profound implications for isuri hana'ah, mechubar, and the relationship between kesef and shetar.
