בבא קמא
40 shiurim · 22 dafim covered
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5 shiurim
Why is one chayav separate korbanos for each melacha on Shabbos? The shiur contrasts two approaches in the Rishonim: Rashi in Pesachim (thirty-nine distinct lavin derived from havoorah) versus Rashi in Yevamos (one lav of "lo sa'aseh kol melacha" divided by sevara). This chakira explains machlokos on hasra requirements for av versus tolda melachos and resolves contradictions in Tosafos and the Rambam.
Are toldos (derivative categories) of damages like their avos (primary categories), or not? The Gemara debates whether toldos pay chatsi nezek like tam or nezek shalem like muad. Rashi and the Rif offer fundamentally different approaches: Rashi holds we don't initially know what toldos are, while the Rif maintains we already know toldos are similar to avos—the question is whether tam/muad distinctions apply to them.
Why does the Mishna say "Arba Avos Nezikin" instead of listing them with "hein"? The shiur examines a fundamental question: does the Mishna enumerate four types of damagers or four categories of damages? Through Tosafos, Rambam, and Chinuch, Rabbi Zweig shows that according to the Rambam, shen, regel, and aish are all adam hamazik—a person damaging through his property—not separate damagers, making the list fundamentally about liability categories rather than distinct damaging agents.
Why does the Rambam rule yeruli that one is liable twice for two toldos of different avos, when the Gemara in Bava Kamma seemingly never addresses this case? The shiur explores Rabbeinu Avrohom's approach that the Gemara discusses only two forms of the same principle, contrasted with the Kesef Mishneh's reading that the Gemara addresses two different principles. A fundamental question emerges: how can av and tolda be liable only once when other cases of different forms (tamchui mechulak, guf mechulak) obligate twice?
What is the fundamental basis for liability in the four avos nezikin? The Mishna states "shmirasan alecha" (guarding is upon you), yet the Torah only commands payment. The shiur examines why shemirah appears as the yesod of liability rather than simply ownership, and explores whether there exists an independent obligation to guard one's property beyond the financial consequence of paying damages.
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Why does the Rambam place the law of a slave's liability for theft in Hilchos Geneivah rather than in Hilchos Nizkei Mamon? The shiur develops a fundamental understanding: the slave becomes liable for kefel (double payment) only upon freedom, not at the time of the act, because the owner receives the kinyan geneivah. This structure reveals that the takanas chachamim was designed to protect the victim, not the owner.
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Why can't we learn kofer liability from bor when Gemara says we can learn regel from keren? The shiur develops a fundamental yesod: kofer is not tashlumin for damage but kapara for chiyuv misa b'dei shamayim. This explains why muad for behema creates kofer liability (Rambam Perek 6) even though muad l'behema isn't muad l'adam for nezikin — kofer requires only peshiya b'shmira, not creating a mazik.
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When a stolen animal (klei) gives birth (becomes ayin), who owns the klei and who owns the ayin? The shiur contrasts three views: Rashi holds the ganav owns only the ayin while the nignav retains the klei; the Rosh holds the ganav owns both through shinui Hashem; the Rambam holds the ganav owns the ayin and this kinyan extends to the klei as well, creating a distinct din between hilchos geneivah and gezeilah regarding when keifel is paid.
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When does a thief pay according to the original value (ki demikora) versus current value (ki dehashta)? The shiur analyzes the dispute between Rabbi Loy and Rabbi Chanina regarding whether the second sale is a valid kinyan, and explores Rashi's fundamental approach that obligates returning the actual stolen object (hashavas geneiva), not merely its monetary value.
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Does yiush work through kinyan geneiva (like shinui), or is it independent like aveida? The Gemara in Bava Kamma 56b presents Rava arguing yiush operates via kinyan geneiva (which the issur delays), while Rav Yosef holds kinyan geneiva prevents yiush from working since one cannot be me'ayeish on an obligation. The Rosh's position—that midrabanan you can hold the object but lack full kinyan—depends on whether we follow Rava's mechanism or Rav Yosef's reasoning.
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If burning a shtar creates no chiyuv keren because of din garmi, why should there be kefel? The shiur analyzes whether shtaros have shaveh kesef and whether kefel applies when there's no shaveh for the paper itself. Tosfos answers that although one is patur midin garmi because the chov can theoretically be resurrected, the shtar itself has market value and therefore kefel applies.
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6 shiurim — daf not yet assigned
Why do Jewish celebrations include elements of mourning, like breaking a cup at weddings or serving mourner's food at a shalom zachar? True simcha requires establishing death as our baseline expectation rather than assuming everything will go smoothly. When we contemplate that guests could have come for nichum aveilim instead of celebration, every blessing becomes miraculous rather than routine.
What distinguishes the av of adam from its toldos? The shiur contrasts the Rambam's view that the Mishna's adam refers to volitional acts (Perek Alef)—carrying isur, immediate chiyuv, and shivud mechaseir—with the Rif's position that the Mishna discusses only responsibility for nezek (Perek Vav). The analysis explores how kocho v'niro, yosher, and other toldos fit into these competing frameworks.
When is a person liable for damage caused by an ox given to a shoteh (mentally incompetent person) or katan (minor)? The shiur analyzes the dispute between Rav Yochanan and Reish Lakish, exploring whether giving to a shoteh/katan constitutes negligence in guarding or whether it creates the damage itself. Rashi and Tosafot offer fundamentally different frameworks for understanding the legal responsibility.
When a thief steals a lamb that grows into a ram, does the change create a kinyan? The shiur analyzes the dispute between Rabbi Eloy and Rav Chanina over whether shinui (change) that happens by itself (memeila) effects a kinyan. A central difficulty: if it's not a real kinyan, why is the thief exempt from daled v'hei but still obligated to pay keren for the object as it was at the time of the shinui?
Can despair (yiush) discharge a financial obligation? The shiur analyzes a case where a community lent money to a duke who defaulted, then his son began repaying—who gets the money? The Ramban's revolutionary approach distinguishes between withholding an object (where yiush helps) versus owing money (where it doesn't), with major implications for understanding issur vs. maaseh gezeila.
When is a stolen korban considered truly "stolen"? The shiur develops a fundamental yesod that the act of theft regarding a korban is only completed at the moment of shechitah, not when the animal is physically taken, because the owner's property right in a korban is intangible and only realizes at the moment of kaparah. This resolves major contradictions in the Rambam regarding ye'ush and mitzvah haba'ah ba'aveirah.
Why does a thief who steals from another thief avoid payment? The Mishna explains that keifel (double payment) applies to all stolen items, while arba v'chamisha (fourfold and fivefold) applies only to an ox or sheep. Gonev achar gonev (one who steals from a thief) is exempt even from keifel, establishing that you cannot pay arba v'chamisha without first being liable for keifel.
Why does the Torah impose a fivefold penalty for stealing an ox but only fourfold for a sheep? The shiur argues that the extra payment isn't about the ox's economic value—already factored into its price—but about depriving the owner of his daily work and sense of purpose. Work itself, not just its financial output, provides essential fulfillment and meaning to human life.
