Elchonon,

I am not sure if I understand your question correctly, so I think it will be safest to first clarify my intention in the Insights in order to make my question on the Ritva more clear.

The Gemara's logic that Edim Zomemim are not Bnei Kaparah explains two Halachos: (1) Why don't they have to pay Kofer if they testify that a person's ox killed a man, and (2) Why don't they have to bring a Korban if they testified that a person sinned the type of sin that obligates him to bring a Korban Chatas or Asham? (This second Halachah is not mentioned explicitly anywhere, but since we never find in the Mishnah or Gemara that Edim Zomemim are punished any punishment other than Misah, Mamon or Malkus, it would seem that they cannot be punished with bringing a Korban.)

My question on the Ritva was that his explanation did not fully answer the second question. According to his logic, one is left to wonder why Edim Zomemim are not punished with bringing an Asham Shifchah Charufah if they testify that someone is obligated to bring such a Korban.

It is true, as you write, that Asham Shifchah Charufah is only brought under specific circumstances. However, "Ka'asher Zamam" means that we transfer onto the witnesses any punishment -- or Kaparah for intentional sin -- that the witnesses tried to bring about through their testimony. Therefore, their punishment should be that they themselves should bring an Asham Shifchah Charufah. After all, the Ritva was willing to have the Edim pay Kofer -- had it been applicable to one who sins intentionally -- even though the Torah says that it applies only in one specific instance (when one's ox kills a man).

Note that the answer of the Ramban -- answer (b) -- does answer this question.

Please let me know if you still have difficulty with the Insights.

Best wishes,

M. Kornfeld