Mishnah Kelim 14:6-7

Sugya Map: The Ontology of "Use"

• Issue: Does the transformation of a tamei-inert object (a metal pot cover) into a functional tool (a mirror) through polishing confer a new status of keli?
• Nafka Mina: Whether the hechsher for Tumah is predicated on the original intended use or the current utility.
• Primary Sources: Mishnah Kelim 14:6, Rash MiShantz ad loc., Rambam, Kelim 11:3.

Text Snapshot

Mishnah Kelim 14:6: "A metal basket-cover which was turned into a mirror: Rabbi Judah rules that it is clean. And the sages rule that it is susceptible to impurity." Nuance: The core dispute rests on ma'aseh (human action). The Sages posit mar'ah meshavei lei mana—the act of polishing elevates the object to "vessel" status.

Readings

• Rambam: Follows the Sages. He argues that once the cover is polished into a mirror, it becomes a keli bifnei atzmo (an independent vessel), severing its identity as a mere lid.
• Yachin: Offers a lomdus perspective: R' Judah holds that because the object’s "primary" identity was a cover (which is tahor), the "subsidiary" function (the mirror) cannot override the original status. The Sages, conversely, view the polishing as an act of yetzirah (creation) that renders the original function irrelevant.

Friction

Kushya: If the mirror reflects a face, it is functional. Why does R' Judah deny it vessel status? Terutz: R' Judah isn't denying the utility; he is denying the legal category. He maintains the bitul (nullification) of the object’s original form. If the primary "nature" of a pot cover is tahor, it carries that halachic "DNA" regardless of subsequent cosmetic modification. The Sages essentially argue for chiddush—a new functional reality creates a new legal entity.

Intertext

The dispute parallels the logic of Mishnah Kelim 12:6, regarding the status of covers. The meta-question is: is Tumah attached to the physicality of the metal or the intended function of the artisan?

Psak/Practice

The Halacha follows the Sages (see Rambam, Kelim 11:3): a metal object repurposed via polishing becomes a keli and is susceptible to Tumah. In modern meta-halacha, this confirms that function defines vessel-status regardless of an item's "original" intent.

Takeaway

Halachic identity is not fixed by origin; human interaction and utility can "re-create" an object, granting it new legal susceptibility.