Very quickly review the second “בעא מיניה אביי מרבה” (sixth wide line) until the third בעא מיניה אביי (middle of the Amud)
Write the three different approaches from Rishonim how to אביי inquiry according to ר”י what method should be used to reduce a gap larger than 13 1/3 Amos between the פסי ביראות should be reduced.
1. Rashi
2. The רשב”א
3. The רמב”ם ה’ שבת פרק יז הלכה כט and the ח’ ר”ן
Learn תוס’ “ואם
Bring a proof from תוס according to which of the three explanations of the first inquiry of אביי he is aligned with.
Learn the third “בעא מיניה אביי מרבה” (middle of the Amud) until the fourth בעא מיניה אביי (nine lines from the bottom of the Amud)
Questions:
Why is it necessary to view the תל המתלקט as carved out in order to be an acceptable דיומד? Why is it not sufficient the fact that there is an Amah of a mechitza on each side?
Why does a round pillar need to be viewed as carved out and squared in order to be an acceptable דיומד? Why does it matter that the outside face plate is round? (See שפת אמת)
There are two approaches to answer these questions
Learn חזון איש
Learn ח’ מהר”ל
Learn the fourth בעא מיניה אביי (nine lines from the bottom of the Amud) until the fifth בעא מיניה אביי on the top of דף כ
Questions:
What is the reason that חיצת קנים would not be acceptable for פסי ביראות as they are considered a bona fide wall by virtue of Lavud?
What is the reason that גודריתא דקני would not be acceptable for פסי ביראות?
Learn ריטב”א