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<blockquote class="gmail_quote" style="PADDING-LEFT: 1ex; MARGIN: 0px 0px 0px 0.8ex; BORDER-LEFT: #ccc 1px solid"><br>>I saw this MB too, but don't really understand it. Is there any other<br>>case where the halacha or minhag is for everyone to do something, but we
<br>>rely on ishto k'gufo to fulfill it?</blockquote>
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<div>havent't been following this discussion so far - sorry if i'm repeating old stuff...</div>
<div>but, ner chanukah is a chovas ha-bayis (ner ish u'beiso) other mitzvos that are a chovas ha-guf we wouldn't rely on the klal ishto k'gufo.</div>
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<div>(parenthetically, the brisker rov has an interesting discussion regarding the relationship between the ikar mitzvah and and hidur mitzvah in his chidushim on the rambam - where he discusses the machlokes rambam/rema regarding who should light the extra candles (bnei ha-bayis/ baal ha-bayis) and bris milah).
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