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תתאה גבר

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  • Started 1 year ago by yitayningwut
  • Latest reply from yitayningwut

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  1. yitayningwut
    Bruno Michel Iksil

    I know this is quite obscure, but about a month ago I mentioned* a Rashba that says that the stagnant object is always the תתאה and the moving one the עילאה, and hello99 claimed that the halacha does not follow the Rashba. I just want to say for the record that the Shach brings it down in Siman 91, and I haven't seen anyone arguing. I asked my rav, and he said that the halacha is indeed in accordance with the Rashba. Ok, now I can go to sleep peacefully.

    *Here: http://www.theyeshivaworld.com/coffeeroom/topic/how-do-i-kasher-a-microwave

    Posted 1 year ago #
  2. popa_bar_abba
    Incorrigible; semi-retarded; eccentric; perhaps a woman; not Mod 80. Sometimes a bit over the top.

    siman 92?

    Posted 1 year ago #
  3. Pashuteh Yid
    Modern Chareidi Zionist

    Anybody want to explain how this fits with modern ideas of heat transfer, that do not distinguish between upper and lower levels in contact. (Heat rises when air is involved since it becomes less dense from molecular motion, and rises to the top.)

    Posted 1 year ago #
  4. jewish source
    Member

    Pesachim סו: Rashi says even though generally we pasken like Rav, here people pasken like Shemuel that tatah gavar.

    Posted 1 year ago #
  5. deiyezooger
    Say my name 6 times fast. cmon. TRY IT

    "Anybody want to explain how this fits with modern ideas of heat transfer, that do not distinguish between upper and lower levels in contact. (Heat rises when air is involved since it becomes less dense from molecular motion, and rises to the top."
    The question is not how the heat transfers, its how a "bliye" or trace amount of taste transfers that according to chazal is one way, meaning that while something "exports" taste it can't "import" at the same time, so if we pasken tatah gavar then the bottom one exports and the top imports.

    Posted 1 year ago #
  6. yitayningwut
    Bruno Michel Iksil

    Popa-

    The Shach I referred to is in 91:23.

    jewish source-

    Correct. However there are different understandings as to what תתאה גבר means, hence the Rashba.

    deiyezooger-

    Not exactly. If the bottom is hot (kli rishon) we say the heat transfers and the issur will then transfer both ways; e.g. by meat and milk they will both become assur. See the gemara quoted above by jewish source.

    Posted 1 year ago #
  7. hello99
    Member

    pardon my failure to respond in a timely enough fashion, I have been both very busy and not feeling well. Here are some sources that disagree with the Rashba, feel free to ask for clarification of any of them.
    תוס' פסחים ע"ו. ד"ה תנן, מהרש"א פסחים ע"ו. על תוס' ד"ה בשלמא, פר"ח ק"ה על סעיף ג' "מפני שמכביד", בית יצחק מובא בדרכי תשובה "אוחז עליון שלא יכביד לא אמרינן תתאה גבר", או"ה כ"ט א' בשם סמ"ק "טבע חם לעלות", הובא בתורת חטאת כ"ג ב', רמ"א ק"ה ג' בענין זה בצד זה שתלה הכל בעליון ותחתון ולא בראשון ושני, יש"ש שחולק לאו משום מקומו, חוו"ד צ"ב כ"ד, ש"ך צ"ב ל"ו א' מג' תירוצים בנזחל כרשב"א אבל שאר לא
    ע' פר"ח צ"ב ל"ב שמן הצד תלוי במקומו אבל מלמעלה אינו יכול להיות תתאה

    Posted 1 year ago #
  8. deiyezooger
    Say my name 6 times fast. cmon. TRY IT

    now this is a mans thread!

    Posted 1 year ago #
  9. popa_bar_abba
    Incorrigible; semi-retarded; eccentric; perhaps a woman; not Mod 80. Sometimes a bit over the top.

    yitayningwut:
    You are correct. I thought you were referring to 92:36, where he says the same thing.

    Posted 1 year ago #
  10. hello99
    Member

    pba: only the second of the Shach's three answers is consistant with the Rashba, the other 2 are clearly NOT.

    Posted 1 year ago #
  11. hello99
    Member

    yitayningwut: anyways the Rashba would not help you for microwaves as the particle or droplet continues to be bombarded by waves on the wall of the microwave and is על האש where we don't say a cold תתאה is גובר.

    Posted 1 year ago #
  12. yitayningwut
    Bruno Michel Iksil

    hello99-

    I am not coming to support the reasoning I used in that thread to be matir a microwave. That was just something I'd heard and did not go into well, and my rav's reasons for being matir in that case have nothing to do with that.

    My point here was simply to say that it is incorrect to blanketly state that the halacha does not accord with the Rashba. This is for two reasons. 1) There are contemporary poskim who explicitly maintain that the halacha follows the Rashba. One such posek is my rav. 2) The Shach brings down (in the place I mentioned, and thanx Popa for your input) the pshat without bringing an argument. I know Tosafos in P'sachim is clearly not like the Rashba, and there are those who hold like that, however, ashkenazim generally follow the Shach, and though you have every right to bring a raya and argue, you cannot claim that there is some kind of halacha psukah not like him.

    Posted 1 year ago #
  13. hello99
    Member

    you're right. I should have stated that the Halacha does not NECESSARILY follow the Rashba.

    Posted 1 year ago #
  14. yitayningwut
    Bruno Michel Iksil

    Hello99-

    I'm fine with that. And thank you for responding.

    Popa-

    Thanx for that other reference. To be honest I have not learned בשר בחלב well yet so I don't know that siman well enough. I am currently in the middle of תערובות which is how I came to the Shach in 91.

    Posted 1 year ago #
  15. hello99
    Member

    yitayningwut: Which siman are you learning? I am currently saying shiur on 103.

    Posted 1 year ago #
  16. yitayningwut
    Bruno Michel Iksil

    91 and 105, מליח כרותח.

    Posted 1 year ago #
  17. rabbiofberlin
    Member

    For once- this thread is truly illuminating...I am in full agreement with 'dayazooger' that this is a "man's thread" (I wish there were more of these)and I stand in awe before iytai,hello99,popa and all of you who are contributing to this thread. It takes me back many years to the days of learning the sugyos in chullin and joreh deah and it gives me an incentive to go back and look at the sources again.Thank you all.

    Posted 1 year ago #
  18. rabbiofberlin
    Member

    Without intruding upon the erudite discussion between our two "beki'im", I have to remark upon hello99's point that a microwave is "al ho'aish" ....where is the heat? particles being bombarded by waves a "kli rishon" do not make. I would imagine this is the cornerstone of the arguments between those who are mattir a microwave for everything (iytai?) and those who maintain that it is a "kli rishon" (al ho'iash, which makes it even more chomur). I have felt the inner walls of a microwave countless of times just after heating food and never did it show any significant amount of heat.Please explain why this should be ever considered as kli rishon or aish.

    Posted 1 year ago #
  19. yitayningwut
    Bruno Michel Iksil

    rabbiofberlin-

    Thank you for your kind words and I am glad you feel inspired.

    The truth is I am not sure at the moment what my rav's reasoning for being matir a microwave for everything is, though I don't think it has to do with the תתאה גבר argument. I will try to look up the teshuva iy"h and post it soon, and I can ask him if there's a question.

    Regarding על האש: I don't fully understand the metzi'us hello99 mentioned about the waves. However I wish to point out that this halacha that when the עילאה is על האש it is worse than a regular תתאה צונן comes from the Ran (not in front of me but I think it's 41b in the dafei haRif), who proves this halacha from the fact that the Gemara (Pesachim 76a) says that תתאה צונן doesn't become assur due to the fact that it cools off the top. Says the Ran, where it cannot cool it off because it is still on the fire, you do not have the סברא of the Gemara, and even a case of תתאה צונן will be assur. This being the reasoning, לכאורה one would be right to assume that one could not differentiate between the locations of any food particles in a microwave, because לכאורה one could make the same argument that even if the walls are cold they do not have the power to cool off any of the particles being "bombarded by the waves," inasmuch as the Ran makes this argument by על האש. Therefore in principle I don't see that hello99 is incorrect.

    Posted 1 year ago #
  20. rabbiofberlin
    Member

    yitay- My point is that ,if there is no real heat- certainly not "jad soledes bo" (which is, at least, 145 degrees), then there is absolutely no reason to say that there are any "bliyot" in the microwave. regardless of your understanding of the psak of ilo-oh or taso-oh govar, there is no heat to include this kind of cooking in the field of "cooking".

    Posted 1 year ago #
  21. yitayningwut
    Bruno Michel Iksil

    Even if there is no real heat, as long as there is a food item which is hot that touches the wall, it can be מבליע (provided the wall has the properties of something capable of being בולע, as opposed to something like glass) and at the point it touches it be considered still על האש, for the wall will not cool it off as long as the microwave is still on.

    Are you saying that nothing heated up in a microwave can reach יד סולדת בו? Because while I hear that in regard to the walls, it is hard for me to believe that regarding the food you heat up.

    Posted 1 year ago #
  22. The Goq
    Founder and president of the CR welcome wagon!

    yitay are u having a better day today? i hope so :)

    Posted 1 year ago #
  23. hello99
    Member

    ROB: bishul needs the דפנות מחממות of a כלי ראשון,however צלי על האש does not. The food in a microwave would be more similar to צלי because it receives its heat by direct radiation.

    Posted 1 year ago #
  24. yitayningwut
    Bruno Michel Iksil

    Yup:) Thanx Goq

    Posted 1 year ago #
  25. rabbiofberlin
    Member

    yitai- The food itself may reach the temperature of "bishul' but it is absolutely not in touch with anything else,certainly not the walls-especially if the food is covered (as it should be) No food ever touches the walls and I do not believe that the walls ever reach a temperature even near 'bishul'.
    hello99- I am not sure how 'zeli aish' helps you here. Basically, the argument about microwaves is ,very simply, whether you can use the same oven for both fleishig and milchig (leave pessach aside for now) Especially if you cover the food, I cannot see any reason why not to use it for that purpose.

    Posted 1 year ago #
  26. hello99
    Member

    rob: "The food itself may reach the temperature of "bishul' but it is absolutely not in touch with anything else"
    I'm referring to the particles and droplets of condensation stuck to the walls and roof of the microwave.

    Posted 1 year ago #
  27. rabbiofberlin
    Member

    hello99- i always cover any food I put in the microwave (unless it is totally parve,like bread or a potato) Condensation does not appear in these circumstances. The only condensation you may see is from an open cup of water as it gest heated, thereby manufacturing steam. IF you would put a plate of soup- uncovered- in the microwave, you might have condensation and hence, if it is chicken soup, they stick to the walls. It still is a question whether the walls are hot enough to absorb it, and maybe that the condesantion just sticks to it, without being absorbed. (remember kdei kelipah)

    Posted 1 year ago #
  28. hello99
    Member

    rob: if your microwave is spotless I am very impressed. I was not referring to unique people like you. Most microwaves that have not been cleaned very recently have pieces and spots on the walls and ceiling. Those objects literally boil on the surface of the oven.

    Posted 1 year ago #
  29. hello99
    Member

    back to תתאה גבר:
    what would you say if the hot bottom item was tiny and 1 degree above yad soledes and the top one was huge and frozen solid?
    Does תתאה גבר tell us that the top one is hot despite our observation to the contrary, has a din kli rishon when observed hot, or can be presumed hot when we don't know?

    Posted 5 months ago #
  30. yitayningwut
    Bruno Michel Iksil

    Hey, you found this! I was just going to link it to Popa!

    Posted 5 months ago #
  31. yitayningwut
    Bruno Michel Iksil

    hello99 -

    Here's what I have written in my notes relevant to this question:

    נראה לע"ד שבאמת אין התחתון אוסר העליון עד שיחממו, אלא דלית לן מלתא פסיקתא בהא שהרי מחממו קצת קצת והמאכלות משתנין לפי טבען וגודל מדתן וזה יתחמם כולו מיד וזה לא יתחמם כולו עד חצי שעה, וספק זה לא דנינן ליה בהלכות ספיקות דדומה ממש להא דאמרינן (עיין לעיל סי' צח ס"ג) מנא ידעינן כמה נפיק. הלכך כשיודע בודאי שחלק מן העליון לא הוחם נלע"ד שלא נאסר ההוא חלק כי אם בכ"ק. גם איכא נפק"מ שאם נפל חתיכה צוננת לתבשיל חם ונפל חתיכה אחרת עליה, אם אין גג של הראשונה חם לא נאסרה השנית, שאין דין זה דתתאה גבר נביאות אלא סברא. ודין זה כתבו ג"כ החו"ד והערה"ש

    וז"ל הערה"ש (סימן צא סעיף יב): ויראה לי ברור דמיירי ששוין הן בהכמות ולפי ערך החלב כן הוא גם כמות הבשר, ולכן נחלקו חז"ל האיכות של מי גובר העליון או התחתון, ואיפסקא הלכה דהתחתון גובר כו', עכ"ל. ונראה שדבריו מבוארים היטב לפמש"כ

    Also, the Aruch Hashulchan in 105 writes as follows:

    יראה לי דבכל הדינים שנתבארו בנגיעת חם בחם בלא רוטב אינו אא"כ הונחו זה על זה או זה אצל זה איזה זמן, דאם תיקף נטלו זה מזה אין סברא כלל שתאסור ברגע אחת, וכ"ש בהנחה בכלי שאינו אוסר אא"כ שהה איזה זמן. ויותר מזה ראיתי לגדול אחד [החמודי דניאל] שכתב דאפילו דבר גוש שנפל לרוטב ותיקף העלוהו אינו אוסר, והביא ראיה ממ"ש בסי' צב דבנפל חלב לקדרה של בשר על חתיכה שחוץ לרוטב וניער וכיסה מיד מצרפין כל הקדרה לששים אלמא דאינו נאסר מיד. ודברי טעם הן, ומ"מ נ"ל דבשם הוי ממש מיד, אבל בחם בחם בלא רוטב או בכלי, אם לא שהה איזה זמן לא נאסר, ואולי הוי השיעור כדי שיתנו על האש ויתחיל להרתיח כמו כבוש בציר, ויש להתיישב בזה לדינא, עכ"ל

    Posted 5 months ago #
  32. hello99
    Member

    Good. To summarize your position, you are suggesting that תתאה גבר only applies when the top object actually becomes hot. Correct?
    In addition to the Aruch HaShulchan you quoted, this is also the view of the Da'as Kedoshim 91:4, andclearlyy implied in the Yam Shel Shlomo 7:45 and many other Achronim.
    Now if תתאה גבר is primarily a מציאות, what would say to this follow-up.
    What if the top item was the hot one, and we clearly see that it significantly warmed the bottom one, maybe even reaching יד סולדת?

    Posted 5 months ago #
  33. yitayningwut
    Bruno Michel Iksil

    If it is certain that it reached yad soledes I would say misvara that it is assur. Otherwise we can assume it didn't reach that temperature, because that gufa is the machlokes Rav and Shmuel - what may we assume when we do not know for sure.

    Posted 5 months ago #
  34. hello99
    Member

    Do you have a source that explains Rav and Shmuel that way. It is a huge Chiddush. I don't disagree, I just suggested the same in a Shiur a gave this week, but couldn't find any supporting source. In fact, the Binas Adam 48 clearly does not learn this way. He writes that a red hot milchig pan placed on raw meat does make it Assur because תתאה גבר.
    In fact, it creates a huge problem. If we don't require a Din of Kli Rishon, why wouldn't a Kli Sheini Yad Soledes Bo or Iruyi be Mevashel the entire item if we see it became hot. The Beis Yosef on 105:2 writes that there is never Bishul w/o Kli Rishon, implying a "Din" is necessary.
    I have a partial answer for this as well, but I want to hear what you think.

    Posted 5 months ago #
  35. yitayningwut
    Bruno Michel Iksil

    hello99 -

    I have been out of the sugya for a bit and want to check over my notes before I answer you. Bl"n within the next day or two.

    Posted 5 months ago #
  36. yitayningwut
    Bruno Michel Iksil

    hello99 –

    I agree that it sounds like a chiddush, but apparently you came to a similar conclusion, so it probably has some sense to it.

    Here is my train of thought; you can tell me what you think of it:

    A) The Gemara clearly applies the idea of תתאה or עילאה גבר to cases where בליעות are irrelevant, as the Gemara (P’sachim 76a) says that through this din you would have a problem of צלי מחמת דבר אחר by פסח.

    Moreover, the Gemara is somewhat mashma that the reason the תתאה חם is אוסר the עילאה is specifically because of its heat, because the Gemara says that when it’s cold and the top is hot, אדמיקר ליה אי אפשר דלא בלע פורתא; mashma that the Gemara was understanding the whole transference of issur על ידי the heat, and therefore it says that even so, until it cools down, it will be מבליע כדי קליפה. (Of course this is only if you translate אדמיקר – until it cools down.)

    Rashi seems to take this p’shat in the Gemara very seriously. He writes (in Rav):

    עילאה גבר. העליון נוצח, הלכך חם לתוך צונן אסור שהעליון מחממו להתחתון והרי שניהם חמין ובלעי מהדדי, וצונן לתוך חם מותר שהעליון מצננו להתחתון ולא בלעי.

    The P’ri Megadim (MZ 105:5) brings a P’ri Toar who explains the Rema’s shita that by נוגעים זה אצל זה they both have a din of עילאה and they only need קליפה. He writes:

    והנה הפרי תואר אות ז חקר בזה מנלן דזה אצל זה די בקליפה. והשיב דמברייתא [פרק] כיצד צולין [פסחים] עו. חם לחם או צונן לחם אוסר, השתא צונן לחם כל שכן חם לחם, אלא הכי קאמר, צונן לחם תתאה גבר והוה הכל חם. וממילא זא"ז אין אחד מגביר על חבירו ואין כח כי אם כ"ק. והא דחם לצונן תתאה גבר הוא, לאו דוקא, דאי נמי זה בחמימותו וזה בקרירותו אין בולע יותר מכ"ק.

    We therefore see that the Rema held like Rashi.

    B) The Ramban in the sugya of טיפת חלב writes (Chullin 108b at the end of ד"ה כגון כו'):

    ויש לפרש דרך אחרת, ולומר דהא דאמרינן כגון שנפל לתוך יורה רותחת, הכי קאמרינן: לאו כדקס"ד בבשר שנפל לתוך יורה של חלב ונתן על האור ונתבשלו, אלא בשנפל כזית בשר צונן לתוך יורה של חלב שהעבירוה מעל גבי האור והיא רותחת דהיא כלי ראשון, ומבלע בלע מן החלב שהוא רותח, מיפלט לא פליט דבשר צונן הוא. ולא מיבעיא לרב דהא אמר עילאה גבר דלא פליט כלום ובשר גופיה בדין הוא דסגי ליה בקליפה אלא כיון דכזית מועת הוא כוליה מבלע דכוליה כדין קליפה הוא ואסור, אלא אפילו למאן דאמר תתאה גבר לא פלטה עד דחיימא ליה מיחם. ואקשינן, סוף סוף כי נייח מלבלוע הדר פליט מאותו חלב שבלע, לפי שכבר נתמלא כולו חלב ונתחמם קצת ואי אפשר שלא יסחט מעט ויפלוט קודם שתנוח יורה גדולה מרתיחתה שלה. ומפרקינן, בשקדם וסילקו, דאכתי לא מבליע כולי האי, ואכתי לא חימם אותו כדי שיפלוט כלום, אבל בדברים המתבשלים ע"ג האור פולטים ובולעים הם, כן נראה לי.

    Question 1: When he writes "אפילו למאן דאמר תתאה גבר לא פלטה עד דחיימא ליה מיחם" he is still willing to say that the כזית בשר is assur. Why?

    I think the answer is that at that point he would say it is assur the same way he said it would be assur according to Rav, because even though it didn’t get heated up, it can become assur בכדי קליפה.

    Which brings us to 2: Why can’t it be פולט a drop into the יורה as well?

    I think the Ramban is saying that this gufa is the Gemara’s kashya, because the Gemara assumed that the reason the meat became assur was because it became a drop hot! On that the Gemara answers that no, there is not enough heat for any בליעות and therefore the meat won’t be חוזר and be פולט into the חלב, because the only reason the meat became assur was not because it got heated up but because as long as the thing it’s touching is hot, it can be בולע כדי קליפה!

    C) What was the machlokes Rav and Shmuel; was it a machlokes in dinei בליעות or a machlokes in dinei heat?

    If it is a machlokes in dinei בליעות, it would be hard to find a case where we know בודאי one way or the other. But if the machlokes is in how heat gets transferred, and it’s just that על ידי the heat the בליעות get transferred, then it is easy to find a metzius where we would know בודאי on our own – when the cold one is still freezing cold!

    Since it seems clear מכל האמור that it is a machlokes in dinei heat, it seems pashut to me that Rav and Shmuel are not arguing in a case where the cold one is still freezing cold.

    D) Where are they arguing then? I think the answer is in a case where we cannot tell, or the situation has already passed. Rav says the metzius is עילאה גבר and therefore we assume only the top will heat up the bottom; Shmuel says תתאה גבר and we assume only the bottom will heat up the top.

    Therefore I am willing to say that if we are certain that the top heated up the bottom (to the level of יד סולדת, less than that isn’t called heat), they will be assur, and similarly if it is certain that the bottom did not heat up the top, they will remain mutar.

    E) All of this is of course only לענין בליעות, but לענין בישול we already know that there is no בישול in anything other than a כלי ראשון.

    Posted 5 months ago #
  37. yitayningwut
    Bruno Michel Iksil

    By the way I am not evading your comments on the microwave thread, I just need time to be מעתיק another relevant teshuva.

    Posted 5 months ago #
  38. ZeesKite
    Because Mommy Said So

    Could I pose a question for you Halachah Technicians out there. Maybe this is the place maybe not, pardon. Here goes;

    Is there a problem pouring hot water from an electric urn, parve into a COFFEE cup that has milk? Does that make the urn milchig?

    Posted 5 months ago #
  39. yitayningwut
    Bruno Michel Iksil

    I just want to add that now that I have seen the Aruch Hashulchan I believe that he held the same way.

    Also, about a point you made on the other thread that the Aruch Hashulchan only agrees to the Chamudei Daniel by solids, if you see the lason I quoted above (the final paragraph ד"ה יראה לי), you'll notice that he only agrees to the Chamudei Daniel by by runny foods; by a solid he is even more meikil. IOW the chiddush of the CD is that the halacha in principle even pertains to a דבר צלול, but the AH's chiddush of עד שירתיח is only said l'gabei a דבר גוש.

    Posted 5 months ago #
  40. hello99
    Member

    yitay: nice chabura. I thought something a little simpler.
    1) It seems Pashut to me that it is impossible to have either Bishul or Bliyos in something that remains very cold. Therefore, while I have numerous proofs that the Sugya must be discussing where both ended up hot, I think they are superfluous.
    2) There are 2 possible ways of explaining תתאה גבר, in my opinion. Either the dispute relates to the Metzius of whether the cold one became hot or not, or it is assumed hot and the dispute is whether it has a Din Bishul similar to a Kli Rishon or no Din Bishul similar to a Kli Sheini.
    3) Since we do not like to describe a Gemara as a Machlokes Metzius, and it should be a simple matter to resolve, they must be arguing something else. I suggest it is what to presume when we didn't see the temperature at the time. However, if we see both are hot, it is irrelevant which was top or bottom. The Machlokes must be limited to when we don’t know. This appears to be the position of the Chavos Da’as and Pri Megadim, as they state that red-hot metal on top of cold overwhelms the bottom one. While this is very logical in Metzius, it has little bearing on a potential “Din”.
    4) The second method is to explain that the debate is when we see the cold one became hot, but we don’t know if it has a Din Bishul. It’s certainly not observable. According to Shmuel and the Halacha, when the bottom one is the hot one, the top one becomes hot through a BBishul process. If it was the top one, it is more like a Kli Sheini. This seems to be the opinion of the Chaye Adam who disputes the red-hot metal case. He writes that since the bottom one is cold, there is no תתאה גבר. He cannot contradict the fact that the bottom item became hot; it is a “Din” that is lacking.

    Now, I still didn’t answer my question. According to the Chavos Da’as and Pri Megadim, why doesn’t every Kli Sheini create Bishul if we see it heated the item in it?
    That will have to wait for a different day.

    Posted 5 months ago #
  41. hello99
    Member

    yitay: regarding the Aruch HaShulchan, I must disagree. He writes ומ"מ נ"ל דבשם הוי ממש מיד with liquid it is Mamash instantaneous. He only agrees for solid, and quantifies the time span at עד שירתיח

    Posted 5 months ago #
  42. hello99
    Member

    ZeesKite: it may be done without any problem, and the urn remains Pareve. Provided you are VERY careful the milk does not splatter on the urn.
    Do you want detailed sources?

    Posted 5 months ago #
  43. yitayningwut
    Bruno Michel Iksil

    ZeesKite -

    I agree with hello99, it is not a problem.

    hello99 -

    The Aruch Hashulchan doesn't mean that the בליעות occur מיד, he means that the ניער וכסה has to be מיד, otherwise the בליעה will happen right after! That's how I understood it anyway. The whole diyyuk of the Chamudei Daniel is that since Rashi says ניער וכסה מיד it must be that there's a moment where there are no בליעות yet. And on that the Aruch Hashulchan says דברי טעם הן.

    As for your shtickel:

    1) I agree.

    2) See 4.

    3) I suggest it is what to presume when we didn't see the temperature at the time.

    That is very similar to what I am saying. I agree, and I like how you are explaining it.

    4) It is hard for me to digest that there is something called a din bishul. Bishul is a metzius that isn't just בליעות and פליטות but a chemical change in the makeup of the item. Chazal said that the metzius is bishul doesn't happen in less than a k'li rishon.

    To answer your quesion therefore, the Chavos Da'as and the P'ri Megadim might hold that the red hot plate is mevashel because they hold it never loses its status of k'li rishon (IIRC the Chavos Da'as says this by the Rema that says keilim are also subject to תתאה גבר). A k'li sheini, though it can be מבליע if we lema'aseh see it heated up the other item, it can never be mevashel.

    Posted 5 months ago #
  44. ZeesKite
    Because Mommy Said So

    hello99 -

    So there's no vapor that goes back up into the urn?

    Posted 5 months ago #
  45. yitayningwut
    Bruno Michel Iksil

    ZeesKite -

    I cannot answer for hello99, but that is correct. We don't say that vapor goes back up into the urn.

    Posted 5 months ago #
  46. hello99
    Member

    correct, unless you see a cloud of milk vapor rising to the urn. While Shulchan Aruch 105:3 mentions such a concept,it is not relevant to this case. Only pouring cold into hot. Even then, it is only a questionable chumra

    Posted 5 months ago #
  47. hello99
    Member

    Yitay: I think that there definitely IS a Din Bishul. On Shabbos one is not Chayav on חמה, תולדות חמה, and חמי טבריה. Additionally, Basar b’Chalav requires Derech Bishul, and some even exempt צלי and טיגון. There is no doubt that all the above could be fully capable of effecting the physical characteristics of cooking, what is lacking is a “Din”. Furthermore, the Beis Yosef’s statement in YD 105:2 that כלל גדול כ"ש אינו מבשל does not sound like a mere estimation of the Metzius. If Bishul was a mere scientific or chemical process, there should be no doubt that כ"ש יד נכוית בו and גוש create Bishul. I think there are many more proofs, but this should be sufficient.
    So, even if תתאה גבר certainly heated the cold item, there would still be a necessity to determine its Halachic status.

    Posted 5 months ago #
  48. hello99
    Member

    yitayningwut: you there?

    Posted 5 months ago #
  49. yitayningwut
    Bruno Michel Iksil

    hello99 -

    Listen, either way we have to say a chiddush. I admit it's a chiddush to say that nothing other than a kli rishon can cause the metzius of bishul, but saying that there is such a thing as a "din bishul" is a tremendous chiddush in my opinion, and if we have to choose, a bigger dochek. Because why in the world would there be such a thing as a "din bishul"? Why wouldn't we look at the metzius? Who made up this "din bishul" and what pasuk was it learned from, that we can take these mi'doraisa halachos and just say they don't apply based on it? I'd rather be madcheh all of your kashyos than say that, and come out lemayseh that the metzius which is called bishul does not occur in anything other than a kli rishon, unless you have a raya to your chiddush that isn't just an ela mai.

    Posted 5 months ago #
  50. hello99
    Member

    Isn't the Tur at the beginning of YD 87 the לא תבשל גדי requires דרך בישול sufficient? Isn't the Halacha that a piece of metal heated in a fire is Chayav on Shabbos, but the same piece heated to the same temperature in the sum is not, enough?
    I think there is very conclusive proof that Bishul in the Torah is more than a chemical reaction.

    Posted 5 months ago #

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