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Learn the גמרא דף ז. “יתיב רב יוסף (two dots) until אמר ליה אביי (second to last line of the amud) 

Learn תוס’ “בקעה 

Clarify the case of מבוי שכלה לרחבה

Learn תוס’ “אם 

Continue learning the גמרא דף ז. ” אמר ליה אביי (second to last line of the amud) until דף ז: “השתא (five lines from bottom of the Amud) 

Clarify the case of מבוי שנפרץ במלואו לחצר ונפרצה חצר כנגדו

What are the two points how the ruling of רב contradicts the ruling of the case of מבוי שכלה לרחבה

Continue learning the גמרא דף ז: “השתא (five lines from bottom of the Amud) until the bottom of the Amud

Conclusion of the Sugya: Following a בת קול

Clarify the two reasons  “תוס’ דף ו: “כאן gives as to why the Chachamim were allowed to ignore the בת קול in the episode related in גמרא בבא מציעא דף נט עמוד ב?

Questions:

What’s the nafka minah between these two reasons?

Why did the Bas Kol say to follow Rebbe Eliezer if that was not the Halacha? 

See רב ניסן גאון on the side of the גמרא ברכות דף יט עמוד א

https://hebrewbooks.org/shas.aspx?mesechta=1&daf=19&format=pdf

According to the second explanation of Tosfos, we do not rule like a Bas Kol. Why do we follow the Bas Kol that said the halacha is like Beis Hillel? 

Based on the conclusion of Tosfos, how many opinions are there in regards to following a Bas Kol? (list the opinions)

Conclusion of the Sugya: Following Chumras of Two Different Opinions

Clarify the two different opinions when a we follow the rule ספק דאורייתא לחומרא ספק דרבנן לקולא and when we say following the chumrahs of two different opinions is considered foolish. 

1.  רשב”א חולין דף מד. “והא

https://hebrewbooks.org/pdfpager.aspx?req=40909&st=&pgnum=40

2. חזון איש עירובין דף ז

https://hebrewbooks.org/pdfpager.aspx?req=14331&st=&pgnum=431

See גמרא ברכות דף כז 

https://hebrewbooks.org/shas.aspx?mesechta=1&daf=27&format=pdf

which brings a machlokes between when the day is considered over in regards to until what time a person can daven mincha and what time a person could start davening maariv.

Rabanan – Day ends at shkia (sunset) 

Rebbe Yehuda – Day ends at Plag Hamincha (two and half halachic hours before shkia) 

The Gemara concludes one could follow whichever opinion they decide. 

Could a person daven Mincha after Plag hamincha and then daven Maariv immediately following (before Shkia)? 

Would it be permitted if it was two different days?  

Learn רא”ש ברכות פרק ד סוף ס’ ג 

https://hebrewbooks.org/pdfpager.aspx?req=14308&st=&pgnum=168

and מאירי ברכות דף כז who have a machlokes regarding this matter

See קהילת יעקב ברכות ס’ א who explains this machlokes is dependent on our sugya. 

Question:

When is a person considered a Rasha for following the leniencies of two different opinions? (two reasons of the Gemara)

Conclusion of the Sugya: Following a בת קול

Clarify the two reasons  “תוס’ דף ו: “כאן gives as to why the Chachamim were allowed to ignore the בת קול in the episode related in גמרא בבא מציעא דף נט עמוד ב?

Questions:

What’s the nafka minah between these two reasons?

Why did the Bas Kol say to follow Rebbe Eliezer if that was not the Halacha? 

See רב ניסן גאון on the side of the גמרא ברכות דף יט עמוד א

https://hebrewbooks.org/shas.aspx?mesechta=1&daf=19&format=pdf

According to the second explanation of Tosfos, we do not rule like a Bas Kol. Why do we follow the Bas Kol that said the halacha is like Beis Hillel? 

Based on the conclusion of Tosfos, how many opinions are there in regards to following a Bas Kol? (list the opinions)

Learn the גמרא דף ז. “יתיב רב יוסף (two dots) until אמר ליה אביי (second to last line of the amud) 

Learn תוס’ “בקעה

Divrei Torah for Tu B’Shevat 5783

Review the “גמרא דף ז. “מ”מ קשיא until the two dots on דף ז 

Clarify when keeping two chumras is considered foolish. 

Learn “תוס’ דף ו: “ומי

According to the conclusion of the Gemara: When is a person considered a Rasha for following the leniencies of two different opinions? (two reasons of the Gemara)

See גמרא ע”ז דף ז. “ת”ר הנשאל  (twelve lines from bottom of Amud) until “ת”ר ” (four lines from the bottom) which brings the rule ספק דאורייתא לחומרא ספק דרבנן לקולא.

https://hebrewbooks.org/shas.aspx?mesechta=27&daf=7&format=pdf

Major Questions:

Based on the above rule according to the first explanation of our Gemara why before the בת קול ruled the halacha like beis hillel was it left to the volition of the individual to decide to follow beis hillel or beis shamai. Why were they not bound by the rule ספק דאורייתא לחומרא ספק דרבנן לקולא ?

According to Rav Shizbi explanation one can not follow two chumrahs of two different opinions if  they are סתרן אהדדי. Based on the rule of ספק דאורייתא לחומרא I should be obligated to follow the stringent opinion in both cases? 

See רשב”א חולין דף מד. “והא

https://hebrewbooks.org/pdfpager.aspx?req=40909&st=&pgnum=40

See חזון איש עירובין דף ז for a different approach

Review “תוס’ דף ו: “כאן 

Clarify the two reasons Tosfos gives as to why the Chachamim were allowed to ignore the בת קול in the episode related in גמרא בבא מציעא דף נט עמוד ב?

Questions:

What’s the nafka minah between these two reasons?

Why did the Bas Kol say to follow Rebbe Eliezer if that was not the Halacha? 

See רב ניסן גאון on the side of the גמרא ברכות דף יט עמוד א

https://hebrewbooks.org/shas.aspx?mesechta=1&daf=19&format=pdf

According to the second explanation of Tosfos, we do not rule like a Bas Kol. Why do we follow the Bas Kol that said the halacha is like Beis Hillel? 

Based on the conclusion of Tosfos, how many opinions are there in regards to following a Bas Kol? (list the opinions)

Review “גמרא דף ו: “ומי עבדינן כתרי חומרי (second wide line) until “דף ז. “מ”מ קשיא  (eight lines from top of the Amud) 

Learn “תוס’ דף ו: “כאן 

Questions:

How does Tosfos explain why the Chachamim in the episode related in גמרא בבא מציעא דף נט עמוד ב were allowed to ignore the בת קול?

Why did the Bas Kol say to follow Rebbe Eliezer if that was not the Halacha? 

See רב ניסן גאון on the side of the גמרא ברכות דף יט עמוד א

Tosfos gives two answers.

What’s a Nafka Mina between the two answers?

According to the second explanation of Tosfos, we do not rule like a Bas Kol. Why do we follow the Bas Kol that said the halacha is like Beis Hillel? 

Based on the conclusion of Tosfos, how many opinions are there in regards to following a Bas Kol? (list the opinions)

Continue learning the “גמרא דף ז. “מ”מ קשיא until the two dots on דף ז 

Clarify when keeping two chumras is considered foolish. 

Learn “תוס’ דף ו: “ומי

According to the conclusion of the Gemara: When is a person considered a Rasha for following the leniencies of two different opinions? 

Learn “גמרא דף ו: “ההוא מבוי עקום (four lines before the wide lines) until “דף ז. “מ”מ קשיא (eight lines from top of the Amud)
Question:
See גמרא בבא מציעא דף נט עמוד ב relates an episode where there was a major dispute between the Chachamim and Rebbe Eliezer and although a בת קול said the Halacha is like Rebbe Eliezer the Chachamim did not follow the בת קול. How was the Chachamim allowed to ignore the בת קול?
Learn “תוס’ דף ו: “כאן

Continue learning the “גמרא דף ז. “מ”מ קשיא until the two dots on דף ז
Clarify when keeping two chumras is considered foolish.
Learn “תוס’ דף ו: “ומי

Learn “גמרא דף ו: “ההוא מבוי עקום (four lines before the wide lines) until “דף ז. “מ”מ קשיא (eight lines from top of the Amud)
Learn “תוס’ דף ו: “ומי
Learn “תוס’ דף ו: “כאן

Continue learning the “גמרא דף ז. “מ”מ קשיא until the two dots on דף ז

Conclusion of Sugya:
How to make an Eruv on a street which is a Reshus Harabim?

Please write a summary and conclusion of the Sugya

List the opinion of the Chachamim and Rebbe Yochanan in regards to what is required on the open sides of the street
Discuss if its contingent on the their argument in regards to אתי רבים ומבטלי מחיצות
Do we conclude like the opinion of Rebbe Yochanan?
List the opinion of the ריף
https://hebrewbooks.org/pdfpager.aspx?req=14312&st=&pgnum=328
and the רא”ש ס’ ח
https://hebrewbooks.org/pdfpager.aspx?req=14312&st=&pgnum=214

List the ruling of the Rambam
See רמב”ם ה’ שבת פרק יד הלכה א and פרק יז הלכה ג
https://hebrewbooks.org/pdfpager.aspx?req=14278&st=&pgnum=58
See רמב”ם ה’ שבת פרק יז הלכה י
https://hebrewbooks.org/pdfpager.aspx?req=14278&st=&pgnum=73

Does the Rambam rule like Rebbe Yochanan?
Seemingly the gemara only discussed whether the door needs to be closed at night or suitable to be closed in regards to a מבוי מפולש.
From where does the Rambam know that ראוי לנעול is acceptable for a רה”ר?
List the different explanations how to explain the ruling of the Rambam

1. See מגיד משנה
   https://hebrewbooks.org/pdfpager.aspx?req=14278&st=&pgnum=73
2. See רשב”א דף ו: “אלא ראויות לנעול for his explanation of the Rambam
   https://hebrewbooks.org/pdfpager.aspx?req=37275&st=&pgnum=9
   https://hebrewbooks.org/pdfpager.aspx?req=37275&st=&pgnum=10
3. See דברי יחזקאל ס’ ו אות א for a different explanation of the opinion of the Rambam
   https://hebrewbooks.org/pdfpager.aspx?req=14038&st=&pgnum=62
   https://hebrewbooks.org/pdfpager.aspx?req=14038&st=&pgnum=63
4. See ב’ גר”א for a new explanation of the Rambam

How does the Shulchan Aruch conclude? (שולחן ארוך או”ח ס’ שס”ד סע’ א)
https://hebrewbooks.org/pdfpager.aspx?req=40431&st=&pgnum=553
and ס’ שמ”ה סע’ ז
https://hebrewbooks.org/pdfpager.aspx?req=40431&st=&pgnum=531

Should one rely on an Eruv that is constructed from צוה”פ when it includes streets which are wider than 16 Amos?
List the different opinions

1. See משנה ברורה שמ”ה סע ז ס”ק כג and “ביאור הלכה “שאין
   https://hebrewbooks.org/pdfpager.aspx?req=40431&st=&pgnum=531
2. See ערוך השולחן ס’ שמ”ה אות יז – כב
   https://hebrewbooks.org/pdfpager.aspx?req=9101&st=&pgnum=384
   https://hebrewbooks.org/pdfpager.aspx?req=9101&st=&pgnum=385
   https://hebrewbooks.org/pdfpager.aspx?req=9101&st=&pgnum=386
3. See חזון איש ס’ ק”ז אות ד https://hebrewbooks.org/pdfpager.aspx?req=14336&st=&pgnum=297