And as the ḥalla of this kneaded, untithed dough is in a state of uncertain purity, its status is suspended: It is neither eaten like ritually pure ḥalla, nor is it burned like impure ḥalla. With regard to which uncertainty did they state this halakha? With regard to ḥalla of uncertain status. The Gemara asks: What is the meaning of the concept of ḥalla of uncertain status? This apparently indicates a scenario of possible ritual impurity that applies specifically to ḥalla, not to non-sacred food.

Abaye and Rava both say: One should not say that we learned this case of ḥalla of uncertain status among the cases of equal proofs, i.e., an unresolvable uncertainty, such as the case of two paths, where someone walked down one of two paths, one of which was ritually impure and the other ritually pure, and he does not remember which one he walked down. As there, even regular non-sacred food is also rendered ritually impure due to uncertainty.

Rather, the uncertainty referred to here is similar to the less likely case of leaning, as we learned in a mishna (Zavim 3:2): In a case of a zav and a ritually pure person who were unloading a package from a donkey or who were loading a package onto a donkey, when their package is heavy the pure person is rendered impure, as perhaps the zav leaned on him while they handled the package together. If their package is light, he remains pure. And in all those cases, he remains ritually pure even if he is one of the members of a synagogue whose congregants handle non-sacred food according to the standards of sacrificial food, as this is not a true case of a zav moving a pure person. But he is impure with regard to matters involving teruma, by rabbinic law.

The Gemara asks: And is non-sacred food that is untithed with regard to the obligation to separate ḥalla really considered like ḥalla to the extent that it is rendered impure even in a case of leaning? But isn’t it taught in a baraita: With regard to a woman who immersed that day and is waiting for nightfall for the purification process to be completed, she may separate ḥalla: She may knead the dough, and separate its ḥalla from it, and place the separated dough into a wicker basket or a wooden board [be’anḥuta], and subsequently she may bring it near the rest of the dough, and she may then designate it ḥalla by name.

The baraita continues: The reason that this is allowed, despite her impurity, is because the dough is impure by third-degree ritual impurity, and an item that has third-degree impurity is considered pure with regard to non-sacred food. The Gemara concludes its question: And if you say that non-sacred food that is untithed with regard to the obligation to separate ḥalla is considered like ḥalla, then she should render it impure with her touch, just as she would render actual ḥalla impure.

Abaye says: With regard to any item that when it is definitely impure renders non-sacred food impure, as in the case of the zav, the Sages issued a decree that its uncertain impurity should also render non-sacred food items impure, due to its status as non-sacred food that is untithed with regard to ḥalla. But with regard to this case of one who immersed that day, since even when she is definitely impure she does not render non-sacred food impure, they did not issue a decree that she should render that dough impure due to its status as non-sacred food that is untithed with regard to ḥalla.

The Gemara asks: But what about the twenty-four-hour period of retroactive impurity of a menstruating woman? As a definitely impure menstruating woman renders non-sacred food impure and nevertheless with regard to untithed dough the Sages did not issue a decree to treat her uncertain impurity as definite impurity due to the dough’s status as non-sacred food that is untithed with regard to ḥalla.

The Gemara cites its source for this claim: As the Master said: Rav Shmuel bar Rav Yitzḥak received from Rav Naḥman: The retroactive impurity of a menstruating woman transmits impurity to non-sacred food items that were prepared according to the standards of purity of sacrificial food, but not to non-sacred food items that were prepared according to the standards of purity of teruma. It is assumed that the level of purity required for non-sacred food items prepared according to the standards required of teruma is the same as that of dough from which ḥalla has not been separated, i.e., it is not treated as real ḥalla, which is rendered impure by her retroactive twenty-four-hour period of impurity.

The Gemara answers: The level of purity required for non-sacred food items that were prepared according to the standards of purity of teruma is actually lower than the level required for dough from which ḥalla has not been separated. The reason is that there, in the case of non-sacred food items, there is no actual teruma mixed in it. By contrast, here, in the case of untithed dough, there is teruma, i.e., ḥalla, mixed in it, which will eventually be separated from this dough.

If you wish, say instead: Leave aside the twenty-four-hour period of retroactive impurity of a menstruating woman, as it applies by rabbinic law. One cannot raise a difficulty against the principle that untithed dough is treated with the same level of purity as ḥalla from the case of the retroactive impurity of a menstruating woman, since that retroactive impurity is a rabbinic decree, and therefore there is more room for leniency.

MISHNA: Rabbi Eliezer says: Unlike the women with regard to whom it was taught that they transmit impurity retroactively, there are four women who discern menstrual blood and their time is sufficient, i.e., they transmit impurity only from the moment that they saw the blood: A virgin, a pregnant woman, a nursing woman, and an elderly woman. Rabbi Yehoshua says: I heard this halakha from my teachers only with regard to a virgin,