Reference: Tana'im argue about this in Nega'im (2:5). A Mishnah says that one may see (rule on) any Nega'im, except for his own. R. Meir says, one may not see even his relatives;

The Tana of the Beraisa here is like R. Meir.

Explanation: R. Meir's reason is like it explains in Sanhedrin (34b). The verse equates Rivim (monetary cases) to Nega'im [and vice-versa]. Just like [we rule about] Nega'im during the day, also Rivim. And just like relatives may not [rule about] Rivim, also Nega'im are not through relatives;

Rabanan do not equate them. They hold that Rivim may be at night.

Citation (Sifri - Beraisa): Aharon said "[if you will not pray for her,] you will [cause us to] lose our sister, for no one can be Metamei her for Hesger, for [absolute] Tum'ah, or to be Metaher her;

From his words we learn that Aharon expounded that one may not see his relatives' Nega'im.

Question: How would she lose? Since a relative cannot see Nega'im, all the more so she is Tehorah! (Bechor Shor and Chidushei Basra answer that Nega'im are a Kaparah for sin. Since he cannot be Metamei her, she will lose this.)

Question: Perhaps it is needed for a Ba'al Mum from birth - one teaches that he eats, and one teaches that he divides!

If we had only one [verse], one might have thought that he eats, but does not divide, like a minor!

Answer: Since we find that one who was Tam and became a Ba'al Mum, there is no distinction between eating and dividing (both apply to him), the same applies to a Ba'al Mum from birth.

Question: Here these three verses "Kol Zachar" are extra for him - those written regarding Minchah, Chatas and Asham. It connotes that we learn from each other. (If not, we would learn only one Chidush, for all three of them);

In the Kal v'Chomer of R. Elazar b'Ribi Shimon [below], he requires three verses for Minchas Yisrael, Chatas and Chazah v'Shok! (Birkas ha'Zevach - since a Ba'al Mum never offers, and the Torah revealed that he divides and eats, there is no reason to distinguish between different Korbanos. A Tevul Yom, Mechusar Kipurim or Onen can serve later. It is feasible to say that he has rights only in certain Korbanos, due to their leniencies or stringencies.)

Question: He asks from a Tamei regarding Korbanos Tzibur, which was a question above. He could have asked from a Kohen Gadol Onen. He is proper for Avodah, and he does not divide. This was obvious to us above (99a), like a Beraisa explicitly teaches!

Question: Why didn't he say like he said above "if you rejected me from Chatas, for just like my rights are great, your rights are great, will you reject me from Chazah v'Shok, for just like my rights are weak, your rights are weak?!"

Observation: Everywhere, the expression [for Rav Achai's questions and answers] are different [from that of other Amora'im], like we find in Kesuvos (2b) "Pashit Rav Achai (he resolved the question)."

Explanation (Rashbam): This is Rav Achai, the author of the She'altos. He was among the Savora'im [Chachamim] after Ravina and Rav Ashi (but before the Ge'onim. Rav Achai) added Hora'ah (teaching), and wrote his words afterwards after the Gemara.

Question: In Kesuvos, we find that Rav Ashi discusses afterwards [Rav Achai's answer. This shows that they were contemporaries! Sefer Yuchsin says that Ba'al ha'She'altos lived until around the year 4500. Rav Sherira Gaon says that Rav Ashi died in the year 738 (from Binyan Bayis Sheni, i.e. more than 350 years earlier)!]