(g) One of the following teachings was taught by R. Yochanan or Reish Lakish, the other was R. Elazar or R. Yosi b'Rebbi Chanina.
(h) (Chacham A): The first Tana distinguishes between learning himself and teaching others -- this is only for Choleh ha'Margil, but nine Kabim always suffice for Choleh b'Ones, even if he plans to teach others;
(i) (Chacham B): In every case, 40 Se'ah are required if one plans to teach Torah to others.
(j) (Chachamim C and D are from the same pairs as above.)
(k) (Chacham C): R. Yehudah requires 40 Se'ah (an actual miqveh) in any case -- the water must be in the ground, not in a vessel;
(l) (Chacham D): The water may be in a vessel, it need not be a kosher miqveh; a bathtub would be fine.
(m) Question: According to Chacham D, we understand why R. Yehudah said "40 Se'ah in any case," to permit water in a vessel; but according to Chacham C, what does "in any case" include?
(n) Answer: It includes Mayim She'uvim (water that was drawn in a vessel), which is acceptable as long as it is deposited in the ground and doesn't remain in a vessel when used for immersion.
(o) Rav Papa, Rav Huna son of Rav Yehoshua and Rava bar Shmuel ate together; Rav Papa asked to lead Birkat haMazon, because nine Kabim were poured on him.
(p) Rava bar Shmuel: But a Barayta taught that nine Kabim permit one to learn, but not to teach or bless for others until immersing in 40 Se'ah!
(q) Rava bar Shmuel: Rather, I should lead Birkat haMazon, because I immersed in 40 Se'ah.
(r) Rav Huna: I should lead, for I had no need to immerse.
(s) Rav Chama would immerse on Erev Pesach to say berakhot on behalf of others (Rashi; alternatively, perhaps he would recite the Hagadah on behalf of others).
(t) The Halachah does not follow him (nine Kabim suffice).