I did not understand a line in the gemoroh on 21b. The gemoroh first explains that they are arguing if a yichud says kedushah in the middle of shemona esrah. Then the germorah a few lines later says everyone agrees we are not mafsik for kedushah. They seem to contradict. Thanks
Moshe Dovid Katz, Brooklyn, ny
The Gemara later does not mean literally that everyone holds this way. Rather, it is a way of saying that the Gemara is concluding that the law is clearly that we are not Mafsik.
Alternatively, we must realize that Ravina and Rav Ashi who finished editing the Gemara were late Amora'im, while Rebbi Yehoshua ben Levi is a borderline Tana/Amora. It is therefore very understandable that at the time of Ravina and Rav Ashi who were issuing this ruling there was no longer anyone who held like Rebbi Yehoshua ben Levi. This would be a simple definition of the words, "Everyone agrees...," as that was the current ruling of all later Amora'im.
All the best,