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Why does the Gemara (גמרא) permit retrieving a partially fallen object in some domain combinations but not others? The shiur develops two competing understandings of the underlying gezeira: preventing actual slippage versus preventing confusion about similar activities. This distinction reshapes how we understand the different rules for karmelis versus reshus harabim.
This shiur provides an extensive analysis of Gemara (גמרא) Shabbos (שבת) 5b, focusing on the complex laws governing when one may retrieve an object that has partially fallen from one domain to another on Shabbos. The Gemara discusses various scenarios: objects falling from reshus hayachid to reshus harabim, from a karmelis to other domains, and the special case of an iskufa (threshold area). Rashi (רש"י)'s interpretation is examined in detail, particularly his view that the prohibition exists because we fear the object might slip entirely from one's grasp, leading to a situation where retrieving it would constitute a biblical violation of carrying. The shiur contrasts this with Rabbeinu Kiveger's understanding, which suggests the concern is not about the object slipping, but rather about creating confusion regarding what types of carrying are permitted.
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Shabbos 5b
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