We have two scenarios here: 1) Trump knew about UBI, a fringe medical practice used primarily in Russia decades ago 2) Trump heard them talking just moments b

We have two scenarios here: 1) Trump knew about UBI, a fringe medical practice used primarily in Russia decades ago 2) Trump heard them talking just moments before about how UV light disinfects outdoor surfaces and kills the virus, and that using chemical disinfectants also killed the virus, and then proceeded to talk about how you could inject disinfectant or put UV light inside the body. Occam's Razor would point us towards the latter. It's just a lot less convoluted to believe he was talking about the same topic the entire prior discussion had been around than to believe he's talking about an obscure and unproven medical practice decades removed from use.