615 - The Eruv, a Jewish Quantum State | Strange Maps | Big Think: Needless to say, there is plenty of lively debate about the exact definition of an eruv, and consequently about the validity of certain eruvs. The scope of these shabbos [11] strings is limited in any case by a very practical consideration: each week, the entire length of the wire and other elements that constitute the eruv’s boundary needs to be rechecked, repaired in case of a breach, and reapproved in time for the start of the sabbath on Friday evening.
As crucial as the establishment of an eruv is for the observant Jewish community, for the outside world it is of no practical consequence - all but invisible and completely irrelevant, except for such times when utility and public works that may interfere with the eruv’s integrity. Ideally such issues can be resolved as an element of public works management.