Gavra, you are defining ???? ??? ???? as spontaneous generation, but that’s likely an incorrect definition. Had we defined it that way and decided to accept the disproof, we would have assered killing kinim. See P”Y.
I thought that was the accepted definition of ???? ??? ????. Do you have a different definition? I am not claiming any level of expertise on this topic.
Also, the treifos issue is not similar. Nobody is claiming that Chazal were wrong, but that the classification of treifos, and therefore the halachah, is determined by what the metzius was at the time of Chazal, and doesn’t change when the metzius changes. IOW, the definition of a treifa is a condition which in Chazal’s times would not allow an animal to live for 12 months.
I don’t know what this means. If a cow gets a disease that would have killed it within 12 months, but we give it Penicillin and it lives, is it now a treifah?
I wasn’t saying they are similar in that Chazal were “wrong” CV (Afar L’pi), but rather that the Halachic definitions don’t change even if different circumstances now apply. We don’t know how ???? ??? ???? affected Chazal’s determination that killing a louse on Shabbos is Muttar, or how 12 months affected Chazal’s decision whether somthing is Halachically defined as a Treifa. All we have are the words of Chazal and their P’sak, which is final.