Rabbi Baruch Bodenheim: Gemara Eruvin: First Perek, יום שלישי Shevat 16, Daf 7a (02/07/23)

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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

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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 

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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