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Why does kinyan chalipin (barter) not work for kiddushin? The shiur analyzes Tosafot's position that chalipin functions through gemirus das (meeting of minds) rather than genuine obligation, making it invalid for creating the unique halachic status of marriage. Unlike regular kesef which effects true transfer, chalipin only manifests agreement.
This shiur presents an intensive analysis of Tosafot on Kiddushin 3a regarding why kinyan chalipin does not work for kiddushin. The central question is how to understand Tosafot's statement that chalipin is a "kinyan acher" (different kinyan) and why the Gemara (גמרא)'s maskana says "isha b'pach mi'sheha pruta lo nikneh" (a woman cannot be acquired with less than a sheva pruta). Rabbi Zweig addresses several key kashas (difficulties). The Maharshal's kasha asks why the maskona can ask from shetar but not from chazakah. The Ran's kasha questions what the Gemara means by "isha b'pach mi'sheha pruta lo nikneh" - the Gemara should simply say there's no gezeiras shavah and therefore chalipin doesn't work. Another difficulty is that according to Tosafot, even in the havamina the Gemara only understood chalipin to work with a sheva pruta, so what was the difference between the havamina and maskona?
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Kiddushin 3a
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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.
