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1)

(a) How did Runya react when Ravina, whose fields surrounded Runya's field on all four sides, and who had built a partition wall on all four sides, when he asked him for ...

1. ... half the costs of the wall?
2. ... half the cost of a fence of cheap canes?

(b) What did he then ask him for, when he refused to respond even to that?

(c) How did Ravina set out to prove that Runya was benefitting from the walls, when he once spotted him picking dates from his date-palm?

(d) What did Ravina reply when, in response to the above episode, Runya argued that one does not need a wall to protect one's date-palms from the goats, because shouting at them is sufficient?

(a) What did Rava rule, when the case was brought before him?

(b) What is the Halachah?

(a) When Runya purchased a field next to Ravina's, Ravina, applying the principle Diyna de'bar Metzra, claimed it, but Rav Safra B'rei de'Rav Yeiva said 'Arba le'Tzala, Arba'ah le'Tzalela'.
What was he effectively ruling?

(b) One explanation is that 'Tzala' means a poor leather-maker, and 'Tzalela', a rich one, and, since each one requires four loaves to feed his family per day, Ravina should leave the field for Runya, who needed it for his Parnasah more than he did (see Rabeinu Gershom).
On what grounds do we reject this explanation?

(c) Then what does it mean, based on the fact that Runya was a leather-maker?

(a) What does our Mishnah say about a wall (six Amos in high, for example) dividing between two Chatzeros that collapses?

(b) What will be the Din if, after rebuilding the wall, Reuven claims half the expenses, and Shimon counter claims that he has already paid?

(c) What will be the Din if Reuven rebuilt the wall of six Amos, and, after refusing to share the costs, Shimon builds a wall of six Amos adjacent to it?

(d) What will be the Din in this latter case, if Reuven claims half the expenses of the six-Amah wall, and Shimon counters that he has already paid?

(a) According to Resh Lakish, if Reuven lends Shimon money to be paid by a given date, and Shimon claims that he paid before the expiry-date, he is not believed.
What do Abaye and Rava say? Why is that?

(b) How do we try and prove Abaye and Rava right from the Reisha of our Mishnah 'be'Chezkas she'Nasan ad she'Yavi Re'ayah she'Lo Nasan'?

(c) What do we answer?

6)

(a) We learned in the Seifa of our Mishnah (in the case where Shimon built a wall parallel to Shimon's six-Amah wall) 'be'Chezkas she'Lo Nasan ad she'Yavi Re'ayah she'Nasan'.
On the assumption that the Tana must be speaking when Shimon claimed to have paid before the expiry-date, what do we try and prove from there?

(b) What makes us initially think that the Tana cannot be speaking when Shimon claimed that he had paid before the expiry-date?

(c) On what grounds do we refute that assumption?

(d) Rav Papa and Rav Huna B'rei de'Rav Yehoshua ruled like Abaye and Rava ('Adam Pore'a Toch Zemano'); Mar bar Rav Ashi ruled like Resh Lakish ('Ein Adam Pore'a Toch Zemano').
Like whom is the Halachah?

(a) We conclude the previous ruling with 'va'Afilu mi'Yasmi'.
What is the case?

(b) What is the significance of this statement? What would we have expected the Din to be?

(a) We ask whether, if Shimon will be believed, if he claimed after the expiry-date that he paid already before.
Having just concluded 'Ein Adam Pore'a Toch Zemano', why might he nevertheless be believed?

(b) What does 'Mah Lo Le'shaker' mean?

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