Questions connected to laws that were instituted by the Rabbis (not Biblical).

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2
votes
2answers
60 views

Nazir: shaving on the start of the vow

I read that a nazir would shave his hair just prior to taking the vow because of a decree of the sages. Is it true? What is the source for this information?
8
votes
1answer
109 views

Why is there no decree against bathing in Chamei Teverya?

Gemara Shabbos says that originally one was allowed to bathe on Shabbos in pre-heated bath-houses. However, (in short) due to the fact that the bath-house directors would violate Shabbos (by heating ...
5
votes
1answer
53 views

Medicines v. Spices on Shabbos

Medicines are forbidden on shabbos for the non-critically ill because in the old days, they had to be ground with a pestle beforehand. Must not spices also be ground? How come spices are not also ...
2
votes
1answer
176 views

Anti-libertarian-ism in Chazal

Most of the halachos of Choshen Mishpat have to do with one person's responsibilities viz-a-viz another person's rights. However, there is at least one halacha of which I am aware where Chazal told ...
1
vote
1answer
169 views

Davar charif cut with meat knife — why not ossur?

The SA in YD Siman 97 Sif 1 (the makor is a braisa in Pesachim Daf 30) says that one should not knead together a dough with milk, lest someone come to eat it together with meat. If one did knead them ...
5
votes
0answers
38 views

What is a shevut d'shevut, and why is it permitted?

I understand there is a notion called shevut d'shevut (and the related gezeira l'gezeira), whereby, in some cases, one may violate a rabbinic prohibition if and only if this is achieved through ...
4
votes
0answers
331 views

To what extent is homosexuality forbidden among non-Jews?

All homosexual behavior is forbidden among Jews, but some actions are clearly Torah prohibitions (e.g. mishkav zachar), while some might be Rabbinic in nature (e.g. lesbian relations). Are all of ...
4
votes
0answers
78 views

Can “Three D'Rabbanans be 'motzei' ”Two D'Rabbanans"

We know that when there is a case of someone that is obligated to perform a mitzvah m'drabbanan (and in fact there are 2 d'rabbanans together) they can't be "motzei" someone in the mitzvah who only ...
3
votes
0answers
48 views

Is lighting a new flame on Yom Tov a Biblical or Rabbinic prohibition?

Is lighting a completely new fire on Yom Tov a Biblical or a Rabbinic prohibition? Please cite your sources.
2
votes
0answers
52 views

Should driving be permitted on Yom Tov for a choleh she-ein bo sakanah?

Since hav'arah (i.e. sparking a new fire) is only de-rabbanan on yom tov (according to some opinions), should there be more halakhic leeway for driving to obtain medical care on a holiday (not on ...
2
votes
0answers
28 views

Shinui and Shemittah: Is there such a thing?

I don't remember the exact words used in the pesukim to describe shemittah, but I do remember that it uses a very similar lashon to shemirat Shabbat. As in, it is forbidden to work the land because of ...
2
votes
0answers
24 views

Why did the Rabbis make a decree for Yovel?

Rambam (Hilchos Tefila 2:8) says that בד"א ביום צום של כל שנה ושנה אבל ביום צום של שנת היובל מתפלל תפלת המוספים תשע ברכות כמו שהתפלל במוסף ראש השנה והם אותן הברכות עצמן לא פחות ולא יותר ואין ...
2
votes
0answers
98 views

Is a triple shvus allowed?

Is there a concept of shvus dishvus with an added shvus making it a rabbinic prohibition 3 times removed. For example if it's yom tov sheini, and the action is rabbinic such as Nolad (turning on a ...
2
votes
0answers
130 views

Who should observe Isru Chag?

I have been trying to understand Isru Chag. While there is a source in tehillim for the words and the gemara derives a notion of extra celebration, there seems to be little about the scope of the day. ...
1
vote
0answers
53 views

Machlokes Deoraisa vs Muttar - non-Jew vs Jew

If one Rav paskens somemthing is Asur Deoraisa and another Paskens totaly mutar, beshas hadechak is it better to get a non jew to do it or a jew whose rav holds its muttar? For example, if a certain ...
1
vote
0answers
154 views

Are there Published Legal Defenses Resolving Objections Against Rabbinic Authority?

Are there Rabbinic "apologetic or polemic works" that focus only on the rational validity, and logical objections raised by other Jews1 -- against: (1.) the Rabbinate's authority in Judaism over other ...
1
vote
0answers
103 views

Understanding how halacha & mitzvot are derived

Since this isn't getting a lot of traction maybe I should approach the question differently. I know that mitzvot can be divided into two basic categories, d'rabbanan and d'oriata. Of the mitzvot ...
1
vote
0answers
85 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 ...