Eruvin 23: When a Mishnah Steers You Wrong
The focus on the cisterns and wells. Plus, the new mishnah - including 3 unusual statements that are not the halakhah, but are in the mishnah, giving us a window into the crafting of the Mishnah. Also: In determining measurements of the area of an eruv, the daf takes us back to the dimensions of the Mishkan, with all the implications of that comparison.
The skinny
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