I had two things I wanted to bring here, one about the issue of a public domain on Sabbath and the other about the famous question on the Rambam about when one forgets the whole 39 and has to bring 39 sin offerings, in what way does he remember Sabbath? {If he forgot shabat completely then he brings only one sin offering. To bring 39, he needs to have remembered shabat but forgot the 39.} In terms of the first thing I really have little to add except to bring the proof of the Gra that one does not need 600,000 to be a public domain. His proof is from Brachot page 58. Ula said we poskin [the law is known] that there is no multitude in Babylon. And we learn in a braita that a multitude is not less than 600,000.and the gemara in eruvin page 6 side b :Ula said the ally ways of Mechuza (a city in Babylonia) would be a public domain if not for the fact that they close the gates at night. However, the Rosh Rashi and tosphot might be depending on the Gemaraa that says the public domain has to be like the flags of the desert. an in the flags of the desert where there were 600,000. The other issue is this. R yochanan said accidental karet but doing the work on purpose is liable a sin offering. And we poskin that way. But everyone how can one do all 39 and still be liable? surely it cannot be a case of his knowing the punishment but not the prohibition. I answer that that is exactly what the Rambam holds. It is just like the sacrifice of the Passover offering. If one does not bring it he is liable karet but there is no prohibition not to bring it. There is only a positive command, the command to bring a Passover offering. even so if he does not bring it he is liable karet. So, in terms of Sabbath there is a positive command to remember Sabbath. So even if he forgets all 39 but knows the punishment of karet that comes because of ignoring thee positive command he is liable a sin offering. That is a case where he forgot that all 39 types of work are prohibited but remembers that there is a positive command to rest from each one of them and if not doing so the punishment is karet..----------------------------------------------------I had two things I wanted to bring here, one about the issue of a רשות הרבים on שבת and the other about the famous question on the רמב''ם about when one forgets the whole ל''ט מלאכות and has to bring 39 sin offerings, in what way does he remember שבת? In terms of the first thing I really have little to add except to bring the proof of the גר''א that one does not need six hundred thousand (ששים ריבוא) to be a רשות הרבים. His proof is from ברכות page נ''ח. THERE עולא said we the law is known that there is no אוכלוסא in בבל. And we learn in a ברייתא that a multitude is not less than 600,000. And the gemara in eruvin page 6 side b :Ula said the alley ways אבולי דמחוזא would be a רשות הרבים if not for the fact that they close the gates at night. However, the Rosh Rashi and tosphot might be depending on the Gemaraa that says the רשות הרבים has to be like the flags of the desert. an in the flags of the desert where there were 600,000. The other issue is this. ר' יוחנן said שגג בכרת והזיד בלאוis liable a חטאת. And we פוסקים that way. But everyone how can one do all ל''ט and still be liable? Surely it cannot be a case of his knowing the punishment but not the prohibition. I answer that that is exactly what the רמב''םholds. It is just like the sacrifice of the פסח. If one does not bring it, he is liable כרת but there is no prohibition not to bring it. There is only a מצוות עשה, the command to bring a פסח. even so if he does not bring it, he is liable כרת. So, in terms of Sabbath, there is a positive command to remember Sabbath. So even if he forgets all 39 but knows the punishment ofכרת that comes because of ignoring the positive command, he is liable a sin offering. That is a case where he forgot that all 39 types of work are prohibited but remembers that there is a positive command to rest from each one of them and if not doing so the punishment is כרת..