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7
votes
4answers
514 views

tap water on Pesach

The New Croton Reservoir supplies much of New York City's tap water, and people are allowed to — and do — go out on boats and fish. I'd venture a guess that almost every Saturday and Sunday, a piece ...
4
votes
1answer
334 views

If chametz is batel before Pesach

If chametz can be batel before Pesach, why don't we buy (before Pesach) any commercially produced product with year-round (i.e., not Pesach-specific) kosher certification which does not list chametz ...
10
votes
1answer
174 views

Nullifying Ancient Israelite Idols

Following up on a question raised on the Avodah list (see here & here under the subject “Destroying Idols”). Archaeologists often dig up idols whose worshipers have abandoned them over the ...
8
votes
1answer
270 views

Bitul BeRov - the classic case in real life

In Halachah there's a tremendously powerful concept of Bitul BeRov (nullification among the majority). It goes like this: If you have three identical pieces of meat, and you know for a fact that one ...
8
votes
1answer
94 views

What's the Shiur of Mashehu?

Certain issurim (forbidden things) can become batel (halachically nullified) if they were unintentionally mixed in heter (permitted things). In order for this to happen, the heter must outnumber the ...
3
votes
2answers
179 views

How can we just make our chametz ownerless?

I'm trying to understand the "legal fiction" wherein we declare any chometz we have as ownerless like the dust of the earth. Is this halachically acceptable? How can a person declare something in his ...