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5
votes
1answer
510 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 ...
12
votes
1answer
290 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
4answers
804 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 ...
6
votes
3answers
269 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 ...
8
votes
1answer
362 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
2answers
146 views

Is there a concept of “bitul beshishim” with regards to fish?

Years ago, some brands of Worcestershire sauce as well as a few salad dressings were marked "OU fish". This meant that one was not allowed to use this sauce on a piece of meat or have it on the same ...
3
votes
0answers
45 views

Ratios of Hameitz-to-Other for Deriving Benefit

For the prohibition on deriving benefit from hameitz on passover, what is the ratio of hameitz-to-other that makes a mixture hameitz? I am aware that when it comes to the prohibition of eating hameitz ...
9
votes
1answer
133 views

Can non-Jews utilize the princple of bittul berov?

The concept of bittul berov means that in certain cases, if some non-kosher food gets mixed up in as much kosher food of the same type such that nobody knows which piece is the non-kosher part, the ...
8
votes
1answer
138 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 ...
6
votes
3answers
156 views

Why seem to sell and be mafkir chametz?

My understanding is that we do both of the following: We (appoint a rabbi as an agent to) sell our chametz to a gentile. This sale takes place the morning of the day before Pesach, before the ...
2
votes
3answers
221 views

One-in-Sixty Versus Roiv- Why both?

There are two concepts in the Halacha of Bittul (nullification). One says that if there is an item that is Unkosher that falls into another item that is Kosher, and it is a mixture, and the Unkosher ...
0
votes
3answers
91 views

Bittul of Hameitz in Mixtures Aquired Before Passover

Looking for clarification on the kind of bittul of hameitz that occurs for foods acquired before, but not during, Passover: What is the maximum ratio of hameitz to other food that the bittul happens ...