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1) TEVILAS KELI ON EREV YOMTOV

(a) (Tana Kama) It is not permitted to immerse a Keli (which became Tamei that day) on Erev YomTov during Bein HaShemashos.
(b) (R. Shimon Shezuri) The same holds for any other day owing to the fact that a Keli needs nightfall after Tevilah before it can be used.
(c) Question: Does the Tana Kama (who seems to permit Tevilas Bein HaShemashos on a Yom Chol) not hold that a Keli requires He'erev Shemesh?
(d) Answer (Rava citing the students of Rav): The Machlokes revolves around relying on the implications of his actions (in a case where the person is running with the Keli during Bein HaShemashos to do Tevilah).

1. The Tana Kama permits on a weekday because his running demonstrates his preparedness to stop if he does not have He'erev Shemesh (but we restrict his YomTov activity lest he toil for naught).
2. R. Shimon Shezuri prohibits and does not attribute his running to anything but his work pattern.

(e) Answer (Rava, his own view): While all concur that one's actions reveal his intent, they argue whether his demonstrated (through his question) lack of knowledge in another area (the Shiur of Tumah, which is not explicit) causes us to assume his lack of familiarity with He'erev Shemesh (which is in the Pasuk) as well.

(a) Question: What is Tevilah from Gav to Gav?
(b) Answer: One immerses his Kelim for use with wine or oil after they were already immersed for oil or wine (this Tevilah is unnecessary and thus permitted on YomTov).
(c) Question: What is Tevilah from one Chaburah to another?
(d) Answer: Re-immersing his Kelim after doing so to eat with one Chaburah, in anticipation of eating with a different Chaburah (again, an unnecessary Tevilah).

(a) (Beis Shamai) One may bring Shelamim, without Semichah, on YomTov, but not Olos (which are not eaten).
(b) (Beis Hillel) They are both brought, with Semichah.

(a) (Ula) (There is no dispute that Shalmei Chagigah are brought and that Nedarim and Nedavos are not brought) the argument is whether there is Semichah by Shalmei Chagigah and whether Olos Rei'ah are to be brought.

1. Beis Shamai interprets the word Chagosem to permit Chagigah, not Olos Rei'ah.
2. Beis Hillel interprets the word LaShem in that Pasuk to allow anything brought to HaShem.
3. R. Ada b. Ahavah affirms that Nedarim and Nedavos are not brought on YomTov.

(b) Question: But R. Shimon b. Elazar taught that there is agreement that non-YomTov Olos may not be brought and YomTov Shelamim are brought and they argue only about bringing YomTov Olos and non-YomTov Shelamim!?
(c) Answer: That Beraisa should be emended and taught in accordance with Ula.
(d) Question (R. Yosef): Why do you insist that there can only be one position of Tanaim; let the matter be a Machlokes Tanaim, where this Tana disagrees with Ula (and allows Nedarim and Nedavos), but another Tana supports him (not permitting Nedarim and Nedavos)!?

1. (Beis Shamai) Semichah is done on YomTov Shelamim before YomTov.
2. (Beis Hillel) Semichah is done on YomTov.

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3. All agree that Nedarim and Nedavos are not brought on YomTov.

(a) The following Tanaim are similarly arguing over whether Nedarim and Nedavos are brought on YomTov:

1. (Tana Kama) A Todah (which is Nedarim and Nedavos) may only be brought on (Chol HaMoed) Sukos.
2. (R. Shimon) If a Korban may not be brought on Pesach it cannot be brought on (Shavuos or) Sukos.
3. (R. Elazar b.R. Shimon) A Todah may not only be brought on Sukos, but one fulfills Simchah thereby.

(b) We analyze the Tana Kama's position in search of the reported Machlokes regarding Nedarim and Nedavos:

1. Question: The Tana Kama's statement that a Todah may not be brought on Pesach because it is Chametz is obvious!?
2. Answer (R. Ada b.R. Yitzhok): We are prohibiting bringing the Todah even on Erev Pesach (when Chametz will have to be burnt before the Korban would have to be consumed) in order to protect it from having to be burnt.
3. The Tana Kama's second statement, that the Todah cannot be brought on Shavuos because of YomTov establishes him as the first position, forbidding Nedarim and Nedavos on YomTov.
4. His third statement, that the Todah may be brought on Sukos must be speaking of Chol HaMoed (since he just taught that it may not be brought on YomTov).

(c) We analyze R. Shimon's position:

1. R. Shimon appears to be prohibiting Nedarim and Nedavos even on Chol HaMoed.
2. Question (R. Zeira): If we are allowed to chop wood on Chol HaMoed for YomTov needs, then certainly we are permitted to offer Nedarim and Nedavos!?
3. Answer (Abaye): The discussion between Tana Kama and R. Shimon is about the timing of Bal T'acher (not about Nedarim and Nedavos on YomTov).

i. Tana Kama holds that the Lav is violated after three consecutive Regalim, counting from the time he made the Neder.
ii. R. Shimon holds that the three Regalim in their order must pass for the person to be in violation of the Lav.

(d) We analyze the position of R. Elazar b.R. Shimon:

1. He allows the Todah to be brought on Sukos.
2. Question: If he allows it on Chol HaMoed, then his position is the same as the Tana Kama!?
3. Answer: He allows it on YomTov, and he is the second opinion in the Machlokes which R. Yosef referred to above.
4. Question: But why did he single out Sukos as being permitted for bringing the Todah?
5. Answer: To affirm his position in the Bal T'Acher discussion that Sukos alone causes the Lav.

i. (R. Shimon) Sukos is mentioned in the Pasuk which is already dealing with Sukos to teach that it is the last Regel in the sequence of three Regalim which must pass to violate the Lav (c.3.ii. above).
ii. (R. Elazar b.R. Shimon) Sukos alone can cause the violation (if the vow was taken just before Sukos, he would only have Sukos to fulfil his vow).