Avodah Zarah

'Ulla said: The difference [between R. Meir and R. Simeon] is over the circumstance where [the mixture] is improved [by the addition of the forbidden element] and in the end deteriorates, but if it deteriorates in the first instance all agree that it is permitted. R. Haga quoted against 'Ulla: If wine [which is nesek] fell into lentils or vinegar into split beans it is prohibited, but R. Simeon permits it. Hence is a case where it deteriorates from the outset, and for all that they differ! — 'Ulla replied: Haga is ignorant of what the Rabbis are here discussing and yet quotes it in objection. With what are we dealing here? E.g., it fell into cold split beans and he then warms them, the effect of which is to improve them, and only in the end are they deteriorated, and so they are prohibited. R. Johanan, on the other hand, said: The difference is when [the mixture] deteriorates from the outset. The question was asked: Is the difference over a case where it deteriorates from the outset and all agree that it is prohibited when it first improves and only in the end deteriorates, or perhaps in either event there is a difference of opinion?  — The question remains unanswered. R. Amram said: Is it possible that R. Johanan's statement  should have any substance and not be the subject of a Mishnaic teaching? He went forth and examined and found a teaching. For we learnt: If non-holy yeast fell into dough and was sufficient to leaven it and did actually leaven it, and subsequently there fell into it yeast of a heave-offering or yeast of mixed plantings  sufficient to cause leavening, it is prohibited — but R. Simeon permits it.  Now, here is a case where [the mixture] deteriorated from the outset  and yet they differ!  — R. Zera said: It is otherwise with dough because it is capable of fermenting many other pieces of dough. Come and hear:  If yeast of a heave-offering and also some which was non-holy fell into dough,  each being sufficient to cause leavening, and they leavened it, then it is prohibited; but R. Simeon permits it. If the yeast of a heave-offering fell in first, all agree that it is prohibited;  but if the non-holy yeast fell in first and then the yeast of a heave-offering or mixed plantings,  it is prohibited, but R. Simeon permits it. Now here is a case where it deteriorated from the outset and yet they differ! Should you answer that here also