R. Dimi (citing R. Yochanan) was uncertain which weight (10 Zuz, two Sela'im and one Shekel) applies to which thread (that of the Parah, the Sa'ir and the Metzora).

Ravin (citing R. Yonasan) attributed the 10 Zuz to the Parah, two Selah to the Sa'ir and one Shekel to the Metzora.

(R. Yochanan): There is a dispute between R. Shimon b. Chalafta and the Rabanan regarding the Parah (is it 10 Zuz or one Shekel) and the mnemonic is One who is Marbeh...

(R. Yirmiyah): No, the dispute is over the Sa'ir and the memory aid comes from the passing of Ravya b. Kisi...

(R. Yitzhok): I was taught two Shechitos, one Kosher be'Zar, and one not ("Parah" and "Paro"), and I do not know which is which.

We are taught that the P'sul of Shechitas Zar is a Machlokes Rav and Shmuel (does it apply to "Parah" or to "Paro").

Rav's response to R. Zeira ("Elazar" plus "Chukah") leads us to conclude that Rav holds that "Parah "is Pesulah be'Zar.

Question: But by "Paro" we also find "Elazar" and "Chukah"!?

Answer: Shechitah is not an Avodah.

Question: Then "Parah" should also allow for a Zar!?

Answer: It is different since it is Kodeshei Bedek ha'Bayis.

Question: Then certainly "Paro" should be Pasul be'Zar!?

Answer: The model is Maros Negaim (not Avodah yet requires a Kohen).

Shmuel, then, holds that "Paro" is Pesulah be'Zar.

Question: But by "Parah" we also find "Aharon" and "Chukah"!?

Answer: The Pasuk ("ve'Shachat Oso Lefanav") teaches that Elazar may watch the Shechitah of a Zar.

Question: What will Rav then do with the Pasuk of "ve'Shachat Oso Lefanav"?!

Answer: To forbid Hesech ha'Da'as.

Question: Whence will Shmuel learn that Halachah?

Answer: From "ve'Saraf... "

Question: What will Rav do with that Pasuk?

Answer: One Pasuk for Shechitah and one for Sereifah.

We need both, since Shechitah is the start of the Avodah, and possibly the only part where a Kohen is required; and,

Sereifah is what makes the Parah effective.

Question: What is excluded (that Hesech ha'Da'as would not invalidate)?

Collecting the ashes and pouring the water over them are not good candidates;

The Pasuk insists on their Shemirah.

Answer: Throwing in the additional ingredients (not part of the actual Parah).

We were taught that there is a Machlokes regarding the P'sul of a Zar by Parah between R. Ami (Kesheirah), R. Yitzhok Nafcha (Pesulah) and Ula (two versions regarding his position).

R. Yehoshua b. Aba asked from a Beraisa (regarding parts of the Avodah which are invalid if performed by a woman) in support of Rav.

Question: What is the challenge to Shmuel from this Beraisa?

If the assumption is that anything which is Pasul if done by a woman would be Pasul if done by a Zar,

We see from sprinkling the water that this is not so.

Answer(Abaye): A woman is excluded because of "Elazar", and that should also exclude a Zar from Parah.

(Ula): When analyzed, some of the Pesukim correct a mis-impression of the previous or following Pasuk; while other Pesukim retain the impressions of the surrounding Pesukim:

"Unesatem...Elazar", implies Elazar and not le'Doros.

Some say this implies that future generations will require a Kohen Gadol (not a S'gan, as was Elazar).

Others say that future generations will allow for a Kohen Hedyot.

Question: On what basis would we insist on a Kohen Gadol in the future?

Answer: "Chukah", "Chukah" from Yom Kipur.

"ve'Hotzei Osah... " not to bring another out with it.

This is taught in a Mishnah that neither a black or another red Heifer may be used to coax the Parah out.

Each has its reason to prevent people from erring.

R. Yosi says that the reason is simply the command of the Pasuk ("Osah").

Question: How will the Tana Kama understand "Osah"?

Answer: This Tana is R. Shimon, who learns the rationale of the Pesukim.

Question: When will their approaches result in a difference in Halachah?

Answer: In a case where a donkey is brought out with the Parah.