So by that by the time you get to like, like the 15th, or 16th, hundreds you have printing presses, even Jewish ones that are now printing these manuscripts, but they're all based on people's memories so that they come out different depending on which printer prints this, and you have clearly different manuscripts of the same piece of Talmud that are different. And ultimately, only in the late 1800s. Does the Vilna ShaS [Talmud] what the Orthodox world considers the absolute authoritative copy of the Talmud come into being, and this is printed, and that's what everybody refers to. And they pretend, or they don't go looking for it, or know about all these alternate texts, which would imply that the Talmud was not given by God to Moses, on Sinai, which is the still the official orthodox view, right? At least the ultra orthodox, now even the modern Orthodox, except that it was put together by people. God may have been the inspiration. But nobody talks about it, because you can't really agree. And there's still a lot of controversy, at least between the ultra orthodox but in Nathan's time and in the time, this is what we learned from the time that Potok wrote his novels, that there was a lot of controversy. There were modern Orthodox scholars, who were finding all these alternative texts, which totally changed the meaning of Jewish law, but also what it changed. What it assaulted was this belief that the whole Talmud a whole or law was given to Moses in one piece, and is like Torah, it's an alterable, unchallengeable. They had written proof, especially to the 1950s they had plenty of manuscripts. And nowadays, even you know, if you use the Shottenstein, the notes showing tell you Oh, there's another manuscript that has these words instead, you'll get a little asterix. But you know, that's now. So Nathan's method of teaching, which at the very end of the promise he gets hired to teach this at the yeshiva is going to be rejected by the deal of students, but also the students who sign up for his class and some who audit his class are very interested in this, especially if they're modern Orthodox. And a lot of my research was trying to find examples of that, that I could put in my book that would be not so esoteric that no but that I didn't want I didn't want the Talmud pages, that piece of Talmud I include and there's like 20 of the sugiyot [portions] that I put in there they study mostly all involved with like women's position and Jewish law, I finally got to collect all the research I had done on how unfairly and unequally in most cases, women are treated by the halachah [Jewish law] at the time, particularly the way the halachah that said women are forbidden that not only women are forbidden to study, men, even their fathers are forbidden to teach them. Obviously, that that's been overturned. I even give you an argument at the end where you get the most modern response, uh, that says why today's women should study should they should study Talmud. But in any case, so I had that was that research was really tricky, and frankly, most of it too esoteric for me to use, but I managed to. And I did find it's a little more. The Orthodox, even ultra orthodox cannot object that you have two different versions of the Tosafot, which is 12th century. They're writing stuff down in those days, if you have two different versions, this is not what God gave us. This is what Grosh His disciples argued over, right? So I found alternative versions of that, which, which I included, but that's the controversy and eventually why what are the reasons that Nathan leaves the yeshiva? Like Potok did and moves to to JTS, where the students will not argue with him so much. And he'll have people that actually take his class because they're interested in it, not because they want to fight with it.