Rabbi Baruch Bodenheim: Gemara Eruvin: First Perek, יום שני Cheshvan 20, Daf 4b (11/14/22)

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Sugya: חציצה
Very quickly review the גמרא דף ד: “חציצין (eighth line from top of Amud) until “מחיצות” (twelve lines from bottom of Amud)

Questions:
Is the הלכה למשה מסיני qualifying what is considered a חציצה on the hair or both the hair and the body?
Review

  1. Tosfos (“תוס’ סוכה דף ו: “דבר) brings יש מפרשים – qualifying exclusively the halacha of hair
    and therefore in regards to a persons body even מיעוט שאינו מקפיד is a chatziza.
    https://hebrewbooks.org/shas.aspx?mesechta=7&daf=6b&format=pdf
  2. Tosfos (“תוס’ עירובין דף ד: “דבר) – qualifying the halacha of both hair and body.

Why is it a given that כולה ואינו מקפיד is a חציצה?
Is the criteria of מקפיד part of the הלכה למשה מסיני?
How could a knot on one strand of hair be a חציצה it is only blocking a minority of persons hair?
How does the יש מפרשים reconcile all the questions of Tosfos?
Learn שפת אמת סוכה דף ו
https://hebrewbooks.org/pdfpager.aspx?req=14522&st=&pgnum=133

Do we evaluate the majority of the hair independent of the body?
Review רמב”ם ה’ מקוואות פרק ב’ הלכה ט”ו who brings two opinions – the רמב”ם and the גאונים
https://hebrewbooks.org/pdfpager.aspx?req=58964&st=&pgnum=214

Question:
What is the basis of the גאונים; why do we calculate the majority of the hair separate than the body?
Learn ח’ הגרי”ז on this רמב”ם