DY: Go back to my first post on this topic. I said that any Chiddush in the realms of Halachah (and yes, the way the world works counts as Halachah) has to have a Makor in Shas. You have to be able to prove it from a source in Chazal. Everything in the Rishonim and Achronim (including the Shulchan Aruch 🙂 ) is based in Chazal. A “Mesorah” that’s not in any Sefarim, by definition, isn’t.
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