Sukkah 17a

AI summary (may contain mistakes)

Why does the Mishnah give three cases of a sukkah whose kosher schach does not reach the wall? The Gemara shows that each case adds to dofen akuma. The wall bends, even backwards, and even across schach pasul. Perhaps Rabba holds there is no dofen akuma at all, and then why the Mishnah repeats three cases stays an open question.

Key points

• In the Gemara's first case, the collapsed house, the walls were made for the inside, so bending them inward is logical.
• The achsadra case shows that dofen akuma works even when the wall was made for the other side.
• The third case teaches that dofen akuma works even when the gap is schach pasul.
• The Rabbanan of Bei Rav hold that avir passels at three tefachim and schach pasul at four tefachim.
• Their answer is that Rav and Shmuel both read the Mishnah's four amos as dofen akuma.

In this shiur

1. 0:00Mishnah: schach distanced from the wall
2. 8:51The Gemara on the three cases
3. 14:24Rabbanan of Bei Rav on avir
4. 20:23Question from the Mishnah's four amos
5. 25:03Rav and Shmuel on dofen akuma
6. 28:04Is there dofen akuma at all?
7. 30:38Three cases without dofen akuma

Topics

• Dofen Akuma
• Schach Pasul
• Avir
• Sukkah