Quickly review the גמרא דף יט: בעא מיניה אביי מרבה (first wide line) until the next בעא מיניה אביי (sixth wide line)
Question:
What is the uncertainty of אביי?
What is the difference whether one reduces the size of the opening between the פסי ביראות through דיומדין or פשוטין?
There are three different approaches offered
1. Rashi – (yesterday we learnt the ח’ ר”ן who explained why a היכר is needed)
2. The ריטב”א
3. The ח’ מהר”ל
What’s a נפקא מיניה between the explanation of Rashi and the Ritva?
Learn רבינו חננאל (on side of the Gemara)
Bring a proof to which of the three explanations he is aligned with.
How do we conclude lhalacha?
See רבינו חננאל (on side of the Gemara)
See רשב”א
Learn the second “בעא מיניה אביי מרבה” (sixth wide line) until the third בעא מיניה אביי (middle of the Amud)
Questions:
What is the uncertainty of אביי?
Why does אביי have reason to believe ר’ יהודה would have a different position than ר’ מאיר in regards to this question?
There are multiple explanations in the Rishonim
1. Learn Rashi
2. Learn רשב”א
3. Learn רמב”ם ה’ שבת פרק יז הלכה כט and the ח’ ר”ן