Does the Shulchan Aruch's ruling about a 'window' (chalon) to the back apply equally to a full door (petach), and is the reverse also authoritative — that a full door is required and a window is insufficient?
Synopsis
The Aruch HaShulchan raises a pointed question: the Talmud uses the term 'petach' (door), but the Tur and Shulchan Aruch write 'chalon' (window). He wonders why a window should suffice, since a window does not allow for normal entry and exit. He leaves the matter as requiring analysis.
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Discussion
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