כגון דאית לה מחיצות. וכי הא דאמר עולא אמר רבי יוחנן: קרפף יותר מבית סאתים שלא הוקף לדירה, ואפילו כור ואפילו כוריים, הזורק לתוכו חייב. מאי טעמא? מחיצה היא, אלא שמחוסרת דיורין.
The valley discussed in the Mishnah in Teharot is unusual, as it refers to a case where it has partitions that are 10 handbreadths high surrounding it. And in accordance with that which Ulla said that Rav Yoḥanan said: An enclosure [karpef], a large courtyard that is not contiguous with the house and does not serve a direct purpose for the house, that is greater than a field that produces a crop of two se’a, that was not originally surrounded by a fence for the purpose of residence, but with a partition to protect his belongings, and even if it is as large as a field that produces a crop of one kor, 30 times the size of a se’a, and even two kor, it is still considered a private domain. And, consequently, one who throws an object into it from the public domain on Shabbat is liable. What is the reason for this? It is a partition that surrounds the enclosure and its legal status is like that of a partition in every sense, except that it is lacking residents. Even though the Rabbis were stringent with regard to this enclosure because of the lack of residents and prohibited carrying in it as if it were a karmelit, that does not negate its primary legal status; by Torah law it is a full-fledged private domain. The same is true with regard to the aforementioned valley. The valley is a large area surrounded by partitions erected for the purpose of protection and thereby assumes private domain status.