Reply To: Killing lice on shabbos

I know I’ll get a lot of pushback but trying to come up with “Creative” answers often takes away from it.
Many people I know believe when it comes to explaining, expounding & setting down the definitive answers about Torah we of course yield to Chazal.
But, when it comes to issues like scientific understanding the Rabbanim were working with the best information they had at that time & in that location. Buvel was a province in the Persian empire. When a modern day halachik issue arises our (reliable) Poskim first learn the details from doctors &/or scientists. Why would it have been different back then? They were consulting with Non-jewish experts & basing their decisions on that information.
I know this offends some people but I’ve never gotten a good answer to, “How does errors in scientific knowledge take away from Chazal being the definitive source when it comes to Torah?”