Havarka and 147: No, because for Halachos based on Sakanah it’s entirely valid to say “Puk Chazi May Ima Davar” and “Keivan D’dashu Bei Rabim…”. And Havarka, putting an Issur based entirely on Sakanah (which might have the status of an Issur D’rabannan, I’m not sure of that, but presumably the only Issur is the Sakanah part) on the same level of Shabbos is ridiculous and you know it.
