DOES THE FORBIDDEN LIMB BECOME NEVELAH?
Answer #2 (Ravina): A Mishkav is not destined to be cut, but the limb of the fetus is destined to be cut (because it is forbidden);
Anything destined to be cut is considered to be cut already.
Suggestion: This is like R. Meir;
(Mishnah): If a handle of a Kli is too long and is destined to be cut, when immersing the Kli, one must immerse as much of the handle as he will keep;
R. Yehudah says, the entire handle must be immersed.
Rejection: All agree regarding a fetus. Since foods are not strongly connected, we view them as if they were already cut.
Question: According to Ula, we understand why the Mishnah said that the limb was cut. If not, the fetus would be Tahor;
According to Ravina, even if the limb was not cut, the fetus is Tamei!
Answer: Indeed, the Seifa says that it was cut merely for parallel structure to the Reisha.
(Mishnah): The fetus is like something that touched a slaughtered Terefah.
Question: A slaughtered Terefah is not Tamei!
Answer (Shmuel's father): A slaughtered Terefah is Metamei Kodshim (mid'Rabanan).
(Mishnah): We find that Shechitah of a Terefah inhibits Tum'as Nevelah. Similarly, Shechitah of the mother inhibits Tum'as Nevelah from a limb (that left the womb)!
(Beraisa - R. Meir): If you say that Shechitah of the mother is Metaher the limb, it should also permit it (to be eaten)!
Chachamim: It is easier to permit something that is not part of the slaughtered animal than something that is part of it.
If part of the fetus was cut off (from the fetus) inside in the mother, Shechitah of the mother permits it. If the spleen or kidneys of the mother were cut off, they do not become permitted.
Question: How does that answer R. Meir's question?
Answer (Rava): The Beraisa is abbreviated. It means as follows:
R. Meir: If you say that Shechitah of the mother is Metaher the limb, it should also permit it!
Chachamim: We learn from a Terefah. Shechitah is Metaher it, but does not permit it.
R. Meir: Shechitah is Metaher the Terefah itself. You have no source that Shechitah of the mother is Metaher a limb (that is not part of the mother)!
Chachamim: Shechitah helps more for something that is not part of the slaughtered animal than for a part of it;
If part of the fetus was cut inside in the mother, Shechitah of the mother permits it. If the spleen or kidneys of the mother were cut, they do not become permitted.
Support (for Rava - Beraisa - R. Meir): If you say that Shechitah of the mother is Metaher the limb, it should also permit it!
Chachamim: We learn from a Terefah. Shechitah is Metaher it, but does not permit it.
R. Meir: Shechitah is Metaher the Terefah itself, or a dangling limb of an animal. You have no source that Shechitah of the mother is Metaher a limb (which is not part of the mother)!
Chachamim: Shechitah helps more for something that is not part of the slaughtered animal than for a part of it.
If part of the fetus was cut inside in the mother, Shechitah of the mother permits it. If the spleen or kidneys of the mother were cut, they do not become permitted.
WHEN IS A LIMB CONSIDERED TO HAVE FALLEN OFF?
Version #1 - (Reish Lakish): R. Meir and Chachamim argue about a dangling limb just like they argue about the limb of the fetus.
(R. Yochanan): They argue only about the fetus' limb, but all agree that Shechitah makes Nipul (makes a dangling limb Ever Min ha'Chai, as if it fell off in the animal's lifetime. It is Tamei.)
(R. Yosi bar Chanina): According to R. Yochanan, Chachamim say that Shechitah is Metaher the fetus' limb but not a dangling limb, because the former could have become permitted (had the fetus returned the limb to the womb before Shechitah), but the latter could not have.
Objection (Beraisa - R. Meir): Shechitah is Metaher the Terefah itself, or a dangling limb. You have no source that Shechitah of the mother is Metaher the fetus' limb!
According to Reish Lakish, we can say that R. Meir addresses Chachamim according to their reasoning;
I hold that Shechitah is not Metaher the fetus' limb nor a dangling limb. Even if you say that it is Metaher a dangling limb, you have no source for the fetus' limb.
We cannot explain the Beraisa according to R. Yochanan!
Rather, the Amora'im argue as follows.
Version #2 - (Reish Lakish): R. Meir and Chachamim argue about a dangling limb just like they argue about the limb of the fetus.
(R. Yochanan): They argue only about the fetus' limb, but all agree that Shechitah does not make Nipul.
(R. Yosi bar Chanina): According to R. Yochanan, R. Meir says that Shechitah is Metaher a dangling limb but not the fetus' limb, because the former is part of the animal slaughtered, but the latter is not. (End of Version #2)
(R. Yitzchak bar Yosef): All agree that death (without Shechitah) makes Nipul, Shechitah does not make Nipul.
Question: What limb does he refer to?
It cannot be a fetus' limb that left the womb. They argue about this!
Answer: He refers to a dangling limb.
Question: Why must he teach this? We learn both of these from Mishnayos!
(Mishnah #1 - R. Meir): If an animal (with a dangling limb) dies, the meat cannot become Tamei until it is Huchshar (water falls on it). The limb has Tum'as Ever Min ha'Chai, but not Tum'as Nevelah.
(Mishnah #2 - R. Meir): If an animal (with a dangling limb and flesh) was slaughtered, (the limb and flesh are) Huchsheru (Lekabel Tum'ah, but it is not Ever Min ha'Chai);
R. Shimon says, they are not Huchsheru.
Answer: We could have understood Mishnah #2 differently, that R. Meir says that Shechitah makes Nipul (the limb becomes Ever Min ha'Chai), and the flesh is Huchshar.
Question: It says 'Huchsheru' (plural)!
Answer: This could refer to dangling flesh and meat that separated (after Shechitah) from a dangling limb.
Question: Why must the Tana teach both? Surely the law of Hechsher is the same for both!
Answer: One might have thought that since the limb is (after Shechitah) Ever Min ha'Chai, which has a severe Tum'ah, meat that separates from it does not need Hechsher. He teaches that this is not so.
(Rav Yosef): Rabah bar bar Chanah supports R. Yitzchak bar Yosef.
(Beraisa): "Do not eat meat torn in the field" includes dangling limbs and flesh, in Behemos, Chayos and birds.
(Rabah bar bar Chanah): The Isur is only mid'Rabanan.