Mishnah Kelim 17:8-9

Sugya Map

• Issue: Defining the threshold of "vessel-hood" (keli) versus "broken utensil" (shavur) through measurable physical standards.
• Nafka Mina: Whether a damaged object retains its halachic category of keli (susceptible to tumah) or loses it, becoming tahor.
• Primary Sources: Mishnah Kelim 17:8-9, Berakhot 39a, Oholot 17:1.

Text Snapshot

The Mishnah Mishnah Kelim 17:8 establishes: "All [wooden] vessels that belong to householders [become clean if the holes in them are] the size of pomegranates." Note the shift in dikduk from the rigid "pomegranate" standard (Tanna Kamma) to the functionalist "what it is used for" (l'fi tashmisho) proposed by Rabbi Eliezer. The text pivots from objective volume to functional utility.

Readings

• Rash MiShantz: Emphasizes that "measures" (shiurim) like the zayit or se'orah are not arbitrary but rooted in the specific physicality of tumah transmission (e.g., bone size for neveilah). He defines agori (the olive measure) via Berakhot 39a: that which holds its essence/juice within.
• Rambam (Comm. to Kelim 17:8): Argues that the Mishnah serves as a foundational taxonomy of shiurim. He links the "ox-goad" (mardea) thickness standard to the laws of Oholot, asserting that susceptibility to tumah is inextricably bound to the physical capacity of an object to contain or transfer impurity based on its functional integrity.

Friction

• Kushya: If a keli is defined by function, why does the Tanna Kamma demand a rigid "pomegranate" measure regardless of the object's original intent?
• Terutz: The Tanna Kamma views a keli as a legal entity defined by its status as a container; once a hole reaches a "pomegranate" size, the legal definition of "receptacle" (beit kibul) is nullified. Rabbi Eliezer, conversely, views the keli as a tool; if the tool can still perform its primary task, the hole is a secondary defect, not a structural loss of identity.

Intertext

• Parallel: The tension between shiurim (standardized measures) and tashmisho (usage) mirrors the debate in Eruvin 13b regarding the dimensions of a sukkah—whether standard measurements override the realities of human habitation.
• Responsa: Chazon Ish (Kelai 17:1) often cites this Mishnah to define "repair" (tikkun)—at what point does a patch restore a vessel's status?

Psak/Practice

The overarching heuristic is batel tashmisho (nullification of function). If the object can no longer perform its primary task, it is tahor. In modern meta-halacha, this informs the definition of "usable" items—if an item is broken to a degree that a "reasonable person" (or the specific user) would discard it, its status as a "vessel" is effectively severed.

Takeaway

The Mishnah teaches that legal status follows functional integrity: a vessel is not defined by its material, but by its capacity to retain. When the "pomegranate" of reality passes through the hole, the vessel ceases to be a container and becomes mere debris.