Mishnah Kelim 4:1-2

Sugya Map

• Issue: Defining the threshold of keli (vessel) status for cheres (earthenware). Specifically, when does a broken shard cease to be a "vessel" and become mere cheres?
• Nafka Mina: Whether a damaged item retains tumah susceptibility or is legally null.
• Primary Sources: Mishnah Kelim 4:1–2; Tosafot Yom Tov (TYT) ad loc.; Rambam, Hilkhot Kelim 4:1–3.

Text Snapshot

• Mishnah 4:1: "חרס שאינו יכול לעמוד... טהור" (A potsherd that cannot stand unsupported... is clean).
• Leshon Nuance: The Mishnah uses "מכריעו" (overbalances). TYT (s.v. Chadud) notes the variant "דד" (nipple/spout), suggesting the impurity hinges on the vessel’s functionality—if it cannot sit level due to design or damage, it loses the status of a keli.

Readings

• Rash MiShantz: Argues that the Sages posit a foundational principle: keli cheres that loses its functional integrity even for a moment is permanently "out" (כיון שטהר שעה אחת שוב אין לו טומאה לעולם).
• Rambam: Focuses on yishuv (stability). If the vessel cannot rest on its base to hold contents, it is no longer a receptacle, regardless of its original form.

Friction

• Kushya: If the vessel is broken but can still hold contents on its side (e.g., "split into two troughs"), why does Rabbi Judah rule it tahor while the Sages rule tamei?
• Terutz: The Sages define "vessel-hood" by the standard position of the object. If it requires being propped up or tipped to function, it has lost the essential definition of a "vessel" (keli), which must be a self-standing receptacle.

Intertext

• Leviticus 11:33: "וכל כלי חרש אשר יפל מהם אל תוכו..."—The Torah’s criteria for keli cheres impurity is the toch (hollow space). If the toch is compromised, the vessel no longer exists.
• Shulchan Aruch, YD 199: Reflects the permanence of taharah in cheres—once it is definitively broken, it cannot be "re-sanctified" to impurity.

Psak/Practice

• Heuristic: Functional stability (yishuv) is the litmus test. If an earthenware object requires external support to hold liquid, it is tahor. This applies to modern ceramic shards: the moment the toch is structurally incapacitated, the keli status evaporates permanently.

Takeaway

Earthenware is defined by the utility of its void. If it cannot sit independently to hold, the law sees only a shard, not a vessel.