(Mishnah - R. Eliezer): If a Nazir became Tamei after the blood of one of his Korbanos was thrown on the Mizbe'ach, this cancels everything;

Chachamim say, he brings the other Korbanos and becomes Tahor.

Chachamim: A case occurred with Miryam from Tarmod. After the blood of one of her Korbanos was thrown, they told her that her daughter was dangerously sick. She went and found her dead. The sages ruled that she brings the other Korbanos and becomes Tehorah.

(Gemara) Question: Why did R. Eliezer say that everything is cancelled? He holds that Tum'ah after the term of Nezirus nullifies only seven days!

Answer (Rav): Indeed, he says that everything is cancelled, i.e. the Korbanos.

Support #1 (Seifa - Chachamim): He brings the other Korbanos and becomes Tahor. (This shows that they argue about whether or not he was Yotzei the Korbanos.)

Support #2: The Seifa brings a case in which a woman became Tamei, and Chachamim ruled that she brings the remaining Korbanos.

(Mishnah): A Kohen Gadol or a Nazir may not be Metamei for a relative who died. He may be Metamei for a Mes Mitzvah;

R. Eliezer says, if a Kohen Gadol and a Nazir found a Mes Mitzvah on the road, the Kohen Gadol should be Metamei to bury him, not the Nazir;

Chachamim say, the Nazir should bury him.

R. Eliezer: The Kohen should be Metamei, for he does not bring a Korban for Tum'ah!

Chachamim: The Nazir should be Metamei, for his Kedushah is not permanent. A Kohen's Kedushah is permanent!

(Gemara): When a Kohen Gadol and Nazir are together, the Tana'im in our Mishnah argue about who has precedence (and should not be Metamei).

A Kohen Mashu'ach (anointed with Kodesh oil) has precedence over a Merubah Begadim (a Kohen Gadol inaugurated only through wearing the additional garments of a Kohen Gadol), for only a Mashu'ach brings a bull if he sinned due to a mistaken ruling;

A Merubah Begadim has precedence over a Kohen Mashu'ach who once substituted for the Kohen Gadol on Yom Kipur, for the former can still serve in the Mikdash, but the latter cannot.

A Kohen who cannot serve due to Tamei due to an emission has precedence over one who cannot serve due to a blemish, for the former can serve tomorrow, but the latter cannot.

Question: Who has precedence among a Mashu'ach Milchamah (the Kohen who speaks to the soldiers in war) and a Sgan (the Kohen prepared to substitute for the Kohen Gadol if necessary)?

Perhaps the former has precedence, for he serves a need in war.

Or, perhaps the Sgan has precedence, for he can serve in the Mikdash.

Answer (Beraisa #1): The only difference between a Mashu'ach Milchamah and a Sgan Gadol is that if they chance upon a Mes Mitzvah, the former becomes Tamei.

Contradiction (Beraisa #2): The Mashu'ach Milchamah has precedence.

Answer (Mar Zutra): The Mashu'ach Milchamah has precedence to be sustained, for many depend on him. Regarding Tum'ah, the Sgan has precedence:

(Beraisa - R. Chanina ben Antigonus): A Sgan is appointed, in case the Kohen Gadol will be Metamei (on Yom Kipur); the Sgan will serve in his place.

Inference: Tana'im argue about who has precedence, but if a Kohen Gadol or Nazir was alone, he may bury a Mes Mitzvah.

Question: What is the source of this?

Answer (Beraisa) Question: "(A Kohen Gadol) will not come upon any dead souls" - what does the verse discuss?

It need not teach that he may not be Metamei for strangers. A Kal v'Chomer teaches this!

A regular Kohen may be Metamei for relatives, but not for strangers. A Kohen Gadol may not be Metamei for relatives, all the more so he may not for strangers!

Answer: Rather, it teaches that he may not be Metamei for relatives.

"For his father" he may not be Metamei, but he may be Metamei for a Mes Mitzvah!