Sam2, you can’t get more definite than Hashem telling you what the halacha is. And yet, lo bashamayim hi. Rambam paskened against Hashem because Hashem TOLD us that we should go like the chachamim, not like Him. So even definitive archaeology wouldn’t overturn anything. Again, this is all off my head, but if someoen has Rabbi Jachter’s book and can quote chapter and verse I would love to hear it.
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