11
votes
3answers
355 views

Would a genetically engineered red heifer be usable?

Assuming that a non-Jew chose to create a genetically engineered parah adumah (red heifer) and further assuming it met all the halachic requirements --no two black hairs, hadn't been used for work ...
5
votes
1answer
59 views

Does Tuma get nullified?

If a drop of Tuma liquid (say a "Mashke" of a zav) falls into a huge vat of water, do we say that all the water is now an Av, or do we say it could get nullified. If it gets nullified, at what ratio? ...
4
votes
1answer
62 views

Notched 2x4 for maamid?

Let's assume that there is a lechatchila to not use metal object that are mekabel tumah (susceptible to tumah) for something that supports the s'chach ("maamid"), which can be avoided by using ...
1
vote
1answer
39 views

How does Tum'ah (“Ritual Impurity”) work?

What are the mechanics by which Tum'ah works? How does one detect it, or diagnose someone as Tamei? Certain materials can contract and transfer Tum'ah. Why do these material do so, but others ...
0
votes
1answer
69 views

Can a Ba'al Qeri act as Shaliahh Tzibbur?

The question arises in the Halakhah (Qitzur Shulhhan Arukh, Yalqut Yosef, Orahh Hayim 88:1) as to whether a Ba'al Qeri (one who has recently released his seed) is permitted to read Qeri'at Shema' and ...
6
votes
0answers
53 views

Beam for s'chach with wood glue + embedded screws

Let's assume that there is a lechatchila to not use metal object that are mekabel tumah (susceptible to tumah) for something that supports the s'chach ("maamid"), which can be avoided by using ...
5
votes
0answers
45 views

Tourist guides for Kohanim

I recently saw a tourist guide for Kohanim, published online by the Chicago Rabbinical Council, listing certain Chicago tourist sites that are, and are not, problematic for Kohanim. Are there any ...
5
votes
0answers
104 views

Putting poison inside bamboo rods (s'chach)

It says in Shulchan Aruch (OC Siman 629 Sif 3) that one may cover a Sukkah with "chitzim" (arrows) that don't have a "beis kibbul." However, if they do have a "beis kibbul," then it's not valid for ...
5
votes
0answers
82 views

Was Naaman tamei from tzaraas?

In Melachim Bet 5:10 we read: וַיִּשְׁלַח אֵלָיו אֱלִישָׁע, מַלְאָךְ לֵאמֹר: הָלוֹךְ, וְרָחַצְתָּ שֶׁבַע-פְּעָמִים בַּיַּרְדֵּן, וְיָשֹׁב בְּשָׂרְךָ לְךָ וּטְהָר.‏ And Elisha sent a ...
4
votes
0answers
76 views

Blessing on Immersing Vessels to Purify Them

A Mikvah can be used to purify humans or certain vessels which have contracted ritual impurity (Rambam Mikvaot 1 (English)). When humans use the Mikvah to purify themselves they recite a blessing ...
4
votes
0answers
53 views

What are the Tumah implications outside of Temple?

What are the implication of tumah other than related to the Temple? E.g., a pathologist in, say, Australia is contaminated with Tumas Mes all the time. Does he have to travel to Jerusalem to get ...
3
votes
0answers
151 views

If a woman converting to Judaism goes to Mikvah during her period but doesn't see any more blood, is she Tehorah?

As a corollary to this question, if a woman goes to Mikvah for her conversion "during her period" (let's say on the 2nd or 3rd day), but for some reason (for which she should probably consult her ...
1
vote
0answers
40 views

רש״י's use of the קל וחומר after it's been discredited (שבת כו ע״ב)‎

The Bavli, Shabas 26 amud 2, derives from some wording in Vayikra that a three-finger-by-three-finger piece of wool or linen fabric can become tame. It then proposes that the verse teaches us only ...
1
vote
0answers
60 views

Why make the Kohen burning the Para Aduma rabbinically impure?

The Gemara says that we make the Kohen burning the Para Aduma (the red heifer) impure and then dip him in the Mikva. The reason given is that there is an argument between the Rabbis and the Sadducees ...
0
votes
0answers
47 views

Examining the Zav

Does anyone know of any rabbinic sources (Talmudic/midrashic) that indicate that a Zav would go to a halakhic authority to be examined regarding his Zivah?