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CHULIN 31-43 - Two weeks of study material have been dedicated by Mrs. Estanne Abraham Fawer to honor the Yahrzeit of her father, Rav Mordechai ben Eliezer Zvi (Rabbi Morton Weiner) Z'L, who passed away on 18 Teves 5760. May the merit of supporting and advancing Dafyomi study -- which was so important to him -- during the weeks of his Yahrzeit serve as an Iluy for his Neshamah.


1. The Tana'im disagree about whether a Tereifah can live.
2. According to Rebbi Yishmael, the Halachah l'Moshe mi'Sinai states that there are eighteen injuries which render an animal a Tereifah.
3. There is a disagreement about whether an animal whose hind leg was severed above the knee is rendered a Tereifah.
4. According to Beis Shamai, if the spinal cord of a Mes lacks two vertebrae, it is not Metamei b'Ohel. Beis Hillel maintains that even if it lacks only one vertebra, it is not Metamei b'Ohel.
5. According to Beis Shamai, if an animal lacks two vertebrae in its spinal cord, it is a Tereifah. According to Beis Hillel, it even if it lacks only one vertebra, it is a Tereifah.
6. Seven injuries which render an animal a Tereifah are not mentioned in the Mishnah.


1. Even according to the opinion that a Tereifah cannot live, it can live for up to twelve months. According to the opinion that a Tereifah can live, it can live even two or three years.
2. According to other Tana'im, there are more than eighteen Tereifos.
3. According to Rebbi Shimon ben Elazar, it is not a Tereifah, because if the remainder of the leg is cauterized it can live.
4. A spinal cord of a Mes is Metamei b'Ohel even if there is no flesh attached. However, if it is lacking two vertebrae according to Beis Shamai, or one vertebra according to Beis Hillel, it is only Metamei b'Maga or b'Masa, but not b'Ohel.
5. The same disagreement applies to both Tum'as Ohel and Tereifah. However, with regard to Tereifah, the position of Beis Hillel is the more stringent one, while with regard to Tum'as Ohel, his position is the more lenient one.
6. The seven injuries are: (1) dislocation of the top of the thighbone, (2) a diseased kidney, (3) a punctured spleen, (4) pipes that are mostly detached (the trachea and esophagus), (5) a dislocated rib, (6) a majority of the skull was crushed, (7) the flesh that covers most of the stomach was ripped.

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