Talmud: Zevachim 10

On 10a, Rav Ashi brings a qal vechomer from shinui baalim to shinui qodesh, showing that (like Rabbi Yohanan) we are mechashvin from avodah to avodah. Later in the same sugya, Rabbi Illa shows that having a heqesh for zeriqah on daf 8 was unnecessary, since it could have been learnt out from a qal vechomer of its own, and having it there shows that we are not mechashvin from avodah to avodah. This is a great observation - but how would Rav Ashi respond to it? Rav Papa responds to it by saying that having an explicit heqesh for zeriqah might mean that we ARE mechashvin from avodah to avodah, but Rav Ashi can't say that, because he has a qal vechomer for the same thing. How can Rav Ashi keep his qal vechomer and still respond to Rabbi Illa? Reply

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