Review גמרא דף כה. “קרפף (second line of the Amud) until “טח בו טיט” (sixteen lines from top of the Amud)
There is a machlokes between the Ritva and Tosfos whether a בור which is ten tefachim deep and four tefachim wide reduces the size of a קרפף
The ריטב”א דף כה. “קרפף says it does not minimize the area.
Question:
Why is a ditch different then a pillar?
https://hebrewbooks.org/pdfpager.aspx?req=37287&st=&pgnum=40
See תוס’ דף כב. “בור
Learn ריטב”א דף כב. “או דלמא
https://hebrewbooks.org/pdfpager.aspx?req=37287&st=&pgnum=34
How do we conclude l’halacha?
See שולחן ערוך אורח חיים ס’ שנ”ח סע’ ד
https://hebrewbooks.org/pdfpager.aspx?req=60389&st=&pgnum=40
https://hebrewbooks.org/pdfpager.aspx?req=60389&st=&pgnum=41
And משנה ברורה ס”ק מד
Is there a difference between a בור that has water inside or an empty בור?
See שער הציון אות מא
Continue learning the גמרא דף כה. “טח בו טיט until הרחיק מן התל” (middle of the Amud)
Questions:
How does building a new wall permit one to carry inside the קרפף ?
Where is the new wall discussed in the Gemara being built; inside or outside of the original fence?
See מאירי
https://hebrewbooks.org/pdfpager.aspx?req=36399&st=&pgnum=38
How long does the new wall need to be?
Learn ריטב”א דף כה. ” הרחיק
Learn רא”ש פרק שני ס’ ד
https://hebrewbooks.org/pdfpager.aspx?req=14312&st=&pgnum=220
What is the point of dispute between the Ritva and the Rosh?
How do we conclude l’halacha?
See שולחן ערוך אורח חיים ס’ שנ”ח סע’ ו
https://hebrewbooks.org/pdfpager.aspx?req=60389&st=&pgnum=41&hilite=
Learn ביאור הלכה “באורך עשר for his explanation of the Machlokes between the Ritva and the Rosh