1)

(a)We ask whether less than a sixth according to the Rabanan of Rebbi Tarfon is considered Mechilah immediately or only after he has had time to show the article to a merchant ... . What are the ramifications of this She'eilah?

(b)How do we try to prove that it must be considered Mechilah immediately?

(c)How do we refute this proof? What is the difference between the two?

2)

(a)We learned in our Mishnah that when the merchants of Lud heard that Rebbi Tarfon gave the purchaser all day to retract, they relented and reverted to the opinion of the Rabanan. What do we mean when we suggest that less than a third according to Rebbi Tarfon, is presumably equivalent to less than a sixth according to the Rabanan?

(b)How do we try to prove from here that the Mechilah must take place only after the time it takes to show the article to a merchant ... ? What would the merchants then stand to lose?

(c)What will be the problem if the Mechilah is immediate?

(d)We answer this Kashya by reestablishing the amount between a sixth and a third according to Rebbi Tarfon like a sixth (rather than less than a sixth) according to the Rabanan. In which point does he then argue with them?

50b----------------------------------------50b

3)

(a)If as we just concluded, Rebbi Tarfon only argues with the Rabanan in that they consider between a sixth and a third Bitul Mekach and he considers it Ona'ah, what problem will that pose on the merchants of Lud?

(b)We are about to ask what the Shi'ur of Bitul Mekach is according to the Rabanan. What are the two possibilities?

(c)How do we try to resolve the She'eilah and answer the Kashya simultaneously?

(d)In that case, why did the merchants of Lud revert to the Chachamim when Rebbi Tarfon told them the purchaser had all day to retract (besides the fact that his Shi'ur is not then really that different from the Rabanan's to make it an advantage [as we will explain shortly])?

4)

(a)We refute the proof that the Rabanan's Shi'ur of Bitul Mekach must be forever (explaining the merchants happiness even if the Rabanan gave Bitul Mekach the same Shi'ur as Ona'ah) by establishing their Machlokes by exactly a sixth. What would then be their Machlokes?

5)

(a)We ask what the Shi'ur of Bitul Mekach is according to the Rabanan. Assuming that it is the same as that of Ona'ah, what will be the difference between Ona'ah and Bitul Mekach?

(b)How do we try to resolve the She'eilah from the fact that the merchants of Lud reverted to the Chachamim when Rebbi Tarfon told them the purchaser had all day to retract? What would be the problem with that, according to the other side of the She'eilah (that it is forever)?

(c)Even assuming that the Rabanan's Shi'ur by Bitul Mekach is the same as that of Ona'ah, why did the merchants choose to revert to the Rabanan, seeing as they still had the advantage of a sixth according to Rebbi Tarfon (which is Mechilah, as we explained above)?

(d)How do we reject the above resolution?

6)

(a)Rava issues a final ruling regarding all three Dinim. What Shi'ur does he give regarding ...

1. ... less than a sixth?

2. ... a sixth?

3. ... more than a sixth?

(b)How does Rava present the basic Halachah of Ona'ah?

(c)On what basis does he cite the Halachah differently than the Beraisa that we quoted above?

(d)If this is the opinion of Rebbi Nasan in the Beraisa that follows, who is the Tana who argues with him (giving him the option of retracting completely from the deal)?

7)

(a)Our Mishnah permits the purchaser to retract up to the time that he can show the object to a merchant ... . What does Rav Nachman comment on this?

(b)On what grounds does he draw such a distinction?

(c)How do we try to support Rav Nachman from the fact that the merchants of Lud reverted to the opinion of the Rabanan when they heard Rebbi Tarfon give a Shi'ur of the whole day?

(d)How do we refute this proof?