Eruvin 91: Not Anything Goes
More on the situations that don't have eruvin - for example, the rooftops that are one domain do not join with other areas that don't have an eruv. Though you can carry within the courtyard - things that were already in the courtyard. Plus - R. Yehudah HaNasi was learning Torah with R. Shimon, they'd carry oil and a towel with them, for their shabbat trip to the spring. Plus - in the time of "danger" - decrees against the Jewish people - ends up being the kind of time that can't be used for precedent. Also - R. Shimon's view seems to be that the entire great outdoors is one domain. Which…
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