Study Zevachim folio 69B with parallel Hebrew-English text, traditional commentary, and modern study tools. Free access to Babylonian Talmud online.
R' Yehuda says: Its status is like any other carcass of an unslaughtered kosher bird, and its meat renders one who swallows it ritually impure.
R' Meir said: My opinion can be inferred a fortiori. If an animal carcass transmits impurity to a person through touching it and through carrying it, and nevertheless the slaughter of an animal purifies it, even if it is a tereifa, from its impurity, i.e., its slaughter prevents it from assuming
And once it is established that slaughter renders a bird that is a tereifa pure, it can be inferred that just as we found with regard to its slaughter that it renders a bird fit for consumption and purifies a bird, even if it is a tereifa, from its impurity, so too its pinching, which renders a bird
R' Yosei says: Although one can derive from the case of an animal that slaughter renders even a bird that is a tereifa pure, that derivation cannot be extended to pinching. The same restriction that applies to every a fortiori inference, namely, that a halakha derived by means of an a fortiori infe
Talmud: In the Mishnah, R' Yosei answers R' Meir by invoking the principle that a halakha derived by means of an a fortiori inference is no more stringent than the source from which it is derived. The Talmud asks: And does R' Meir not require that a fortiori inferences conform to the principle that