A butcher (Reuven) said to Shimon 'had you been friendly with me, I would have given you from a fattened ox I slaughtered yesterday.'

Shimon: I ate from the best part of it!

Reuven: Where did you get a part?

Shimon: I got from a Nochri who bought it from you.

Reuven: I slaughtered two fattened oxen yesterday. He bought the Terefah.

Version #1 (Rebbi): Just because Reuven acted improperly (he sold a Terefah to a Nochri meat vendor), we will not forbid people to buy today from Nochrim (since most of the butchers are Yisraelim)! (Rashi; Tosfos - just because Reuven acted improperly (he sold a Terefah without announcing), we will not forbid people to buy from other Nochrim!)

This is consistent with another teaching of Rebbi;

(Rebbi): When the butchers in the meat markets are Yisraelim, meat found in a Nochri's hand is assumed to be Kosher.

Version #2 (Rebbi): Just because (Reuven) wants to annoy Shimon (by pretending to have sold a Terefah without announcing), we will not forbid people to buy today from Nochrim.

Inference: If not that Reuven were trying to annoy Shimon, we would forbid people to buy today from Nochrim!

Contradiction (Beraisa - Rebbi): When the butchers in the meat markets are Yisraelim, meat found in a Nochri's hand is assumed to be Kosher.

Answer: This case (if Reuven really sold a Terefah) is different, for we know that there is Terefah meat in the market.

(Rav): Meat that was (at least for a moment) unsupervised is forbidden.

Question (Beraisa - Rebbi): When the butchers in the meat markets are Yisraelim, meat found in a Nochri's hand is assumed to be Kosher.

Answer: Meat found in a Nochri's hand is different. (We are not concerned lest ravens switched it with meat from a place where most butchers are not Yisraelim.)

Question (Beraisa): If nine stores in the city sell slaughtered meat and one sells Nevelah, and one is not sure from which he bought, the meat is forbidden;

If meat is found, we follow the majority.

Answer: The meat was found in a Nochri's hand.

Question (Mishnah): If meat was found in a city:

If the majority of butchers are Yisraelim, we assume that it is Kosher. If not, it is Nevelah;

If cooked meat is found, we follow the majority of meat eaters.

Suggestion: Perhaps here also, the meat was found in a Nochri's hand!

Rejection: If so, if it were cooked, we would not follow the majority! (Surely, he cooked it, so it is forbidden.)

If it was found in a Yisrael's possession, it is permitted. If it was found in a Nochri's hand, it is forbidden!

Answer: The case is, Levi saw a person drop the meat. (He could not tell whether the person was a Yisrael.)

Question (Mishnah): If meat was found outside Yerushalayim:

Whole limbs are assumed to be Nevelah (they are cast whole into the wasteheap). Pieces are permitted.

Suggestion: Perhaps here also, the finder saw a person drop the meat.

Rejection: If so, we would not assume that a whole limb is Nevelah. (It was not meant for the wasteheap!)

Answer: Rav explains that the Seifa does not permit pieces to be eaten;

(Rav): The Seifa says only that pieces are not considered Nevelah. (They are not Metamei. One who eats them is not lashed, but one may not eat them, since they were not under constant watch);

(Levi): One may eat pieces.

Rav's law was not said explicitly, it was derived from something he said.

Rav saw a man washing a head in the river. It fell in. The man took a basket and scooped out two heads.

(Rav): We do not know from whom the other head fell, so both are forbidden.

Question (Rav Kahana): Perhaps also the other head was permitted!

Answer (Rav): It is more likely that it was forbidden.

Question: What difference does it make whether or not Rav explicitly said his law?

Answer: Perhaps Rav said this only in a city where most butchers are Nochrim.

Support: Rav said that forbidden meat is more common.

Question: According to Rav, how is one allowed to eat meat?

Answer #1: It was watched from Shechitah until it was eaten.

Answer #2: It is wrapped and sealed, or there is a special Siman on it.

Rabah bar Rav Huna would cut his meat on three corners.

Rav went to visit his son-in-law. The ferry was coming towards him. He considered this to be an omen that he would have a good day.

At the house, he looked through a crack in the door and saw hanging meat. Rav knocked, and everyone came. Only Rav kept watching the meat.

Rav: (If not for me) would you feed my grandchildren Isur (forbidden food)?! Rav did not eat from the meat.

Question: Rav kept watching it!

Version #1 - Rashi - Answer #1: He did not eat it, for this would be like Nichush (to fulfill the omen that he would have a good day).

Objection: Rav taught that Nichush is forbidden only if it is like that of Eliezer ("if she will give water to me...") and Yonason (ben Sha'ul, "if they will say 'come up', we will go")! (I.e. one says what he will do if the Siman he requests is fulfilled, and if it is not.)

Version #2 - Radak (Shmuel 1:14) - Answer #1: He did not eat it due to Nichush (everyone had neglected the meat. This was a bad omen.)

Objection: Rav taught that only a Nichush like that of Eliezer and Yonason is reliable! (end of Version #2)

Answer #2: Rather, Rav would eat only at a meal that is a Mitzvah.

Rav would decide (whether to go) based on the ferry (if it came to greet him. Maharsha - this is not Nichush, for he did not say that he acts based on this.) Shmuel would decide based on verses. (I.e. he would open a Sefer Torah to see the verse that comes up - see Shiyurei Berachah on Birkei Yosef YD 179:6.) R. Yochanan would ask a child which verse he is learning. (Rashi; Rambam - a good Siman would make them happy, but they would not act upon it.)

When Rav was alive, R. Yochanan would address letters to him 'to our teacher in Bavel.' After Rav died, he would write (to Shmuel) 'to our colleague in Bavel'.

Shmuel wanted to show that also he was a Rebbi to R. Yochanan in some respect. He sent to him the calculation of (the equinoxes, which determines) which years should be leap years for the next 60 years.

R. Yochanan: That is mere calculations!

Shmuel sent him 13 camels laden with (Tosfos - 13 scrolls of) Safek Terefos (Rashi - alternatively, the Safek (Tamei or Tahor) birds of Perek ha'Terefos (62b).)

R. Yochanan: He is a Rebbi to me. I will visit him.

R. Yochanan asked a child 'what verse are you learning?' The child replied "and Shmuel died." R. Yochanan did not go. (Kesef Mishnah - this is unlike Nichush that the Rambam forbids, for he asked about something in the past, i.e. whether or not Shmuel already died. Beis Yosef - it is forbidden only if one explicitly says that he acts according to the omen.)

Really, Shmuel had not died. Hash-m did not want R. Yochanan to exert himself.

(Beraisa - R. Shimon ben Elazar): Even though we don't act based on omens such as experiencing success after having built a house, having a son born or having married a woman, we may act based on Simanim of these events.

R. Elazar: We may only act on it if it worked three times - "Yosef is missing, and Shimon is missing. If you will take Binyamin (every affliction will come upon me)."

Version #1 - Question (Rav Huna): If meat on a string was not watched, what is the law?

Answer (Rav): Obviously it is a Siman (that it is the same meat. It is permitted.)

Version #2 (Rav Huna): Meat on a string is a Siman (it is permitted, even if it was not watched.) (end of Version #2)

On Erev Yom Kipur, ravens dropped livers and kidneys.

Rav Nachman: They are permitted. Most meat slaughtered today is Kosher. (This is one of the days on which Yisre'elim slaughter many animals.)

R. Chiya bar Avin lost the end of the intestines. He did not have a Siman, but he recognized it.

Rav Huna: They are permitted to you.

R. Chanina Chuza'ah lost a back of meat. He did not have a Siman, but he recognized it. Rav Nachman permitted the meat.

R. Noson bar Abaye lost a ball of Techeles thread. He did not have a Siman, but he recognized it. Rav Chisda permitted him to use it (for Tzitzis).