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Why is eating dry pepper exempt on Yom Kippur while eating fresh ginger is obligatory, even though neither is eaten normally? The shiur analyzes the Gemara (גמרא)'s two separate halachos and argues the Rambam (רמב"ם) distinguishes: eating requires normal derech achilah (the pepper case), but Yom Kippur's "yeshuv hadaas" can be violated even by non-standard eating that reduces hunger (the ginger case). This resolves both the Maggid Mishna's textual difficulty and the Tosfos Yom HaKipurim's question about chatzi shiur.
The shiur begins with the Tosfos Yom HaKipurim's question: How can there be a din of chatzi shiur on Yom Kippur when the prohibition is lo se'uneh, not lo sochal? The Gemara (גמרא) in Yoma 81b presents two cases: one who chews dry peppers (pilpilin) on Yom Kippur is exempt, and one who chews ginger (zangvila) is likewise exempt. The Gemara then asks two separate questions - from orlah regarding peppers, and from bishul akum regarding ginger - and answers that when these foods are fresh (retuvim), they are considered food, but when dry (yavesh), they are not. Rabbi Zweig argues that the Gemara is not merely presenting two examples of the same principle, but rather two fundamentally different halachos. This reading resolves a major difficulty in the Rambam (רמב"ם) (Hilchos Shevitat Asor 2:6). The Maggid Mishna notes that the Rambam's language appears problematic: "One who chews dry peppers and ginger and similar items is exempt, but fresh ginger is obligatory." The simple reading suggests that fresh pepper should also be obligatory, yet the Rambam omits this. The Maggid Mishna proposes emending the text to read "fresh [peppers and ginger]" in plural, though no manuscript supports this reading.
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Yoma 81b
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