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If you honestly believe that you are wearing true tekhelet then you are not in violation of the Gemara (BM 61b). If your tekhelet turns out to be false tekhelet, then you will have only fulfilled the mitzvah of tzitzit but not the aspect of tekhelet, as the Gemara (Men. 40a) explains is the case for one who unwittingly wore kela ilan - see my article "False ...


According to - page 5 the Para Aduma born in 2002 was disqualified as it grew 3 white hairs.


If you know the fellow publicly flouts shabbos-observance, then we have a problem. (And what does "publicly flout" mean in today's world is another question; Rabbi Joseph Soloveichik is quoted as saying that if he'd be embarrassed to be seen doing it while the rabbi walked by, that's still not "publicly flouting.") Rabbi Shternbuch was asked regarding a ...


No the disqualification does not apply. The Rambam in Hilchot Edut Chapter 11 Paragraph 7 writes: עד אחד נאמן באיסורין, אף על פי שהוא פסול לשאר עדייות (my translation) A single witness is beleived regarding forbidden matters even if he is disqualified for other testimonies. The Rambam makes similar statements regarding the validity of the testimony of one ...


The Shulchan Aruch (OC 657) rules that if a child knows how to wave the 4 species appropriately, his father must, because of the obligation of Chinuch -- education, arrange for him to have a set. The Biur Halacha (sv Katan) notes that this is true even if they are unable to recite the proper blessing. In sv Kedei, he says that "it is obvious that the set ...


Igros Moshe Even Haezer 4 105:3 says that such a Kesuva is no good. Based on that one would have to get a rabbi to redo their Kesuva in such a case. ובענין כתובה שנכתבה ביום והיו עסוקין באותו ענין עד הקידושין שהיו בלילה. הוריתי שבזמננו שעדיין לא קדש ולא נתחייב בכלום פסולה דהוי שטר מוקדם, וזה שהכשירו בגמ' גטין דף י"ח ע"א הוא דוקא בזמנם שהי' אחר ...


If the distance from the ground to the bottom of the tree is ten tefachim, you don't fulfill your obligation (Orach Chayim 627:1).


No, because the sukkah is supposed to be the one that covers you, not the tree.


According to the Rambam, the tzitzit is passul if you use the wrong blue-dye for the techelet. (See my post here: Mishna Torah - Hilchot Tzitzit- chapter 2, halacha 1


According to the Rambam, your tzizit can be any color really. The only thing they can't be is either all techelet, or techelet made from indidgo plants. (Some read this to mean any plants) Since the Radzyner are made from animals and inorganic material but not plants, then this is not a problem. I have heard some people say that you should put a bit of ...

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