Once I convinced myself that Vax was actually Scadrial all along. I don’t know what my reasoning was, but it was around 1am and I couldn’t sleep and I was sure that Vax was Scadrial.
Edit: Okay, maybe because it was because of Ati’s “Vax?” at the end of Secret History. I think I might’ve thought: “but what if Scadrial was originally Vax, but then its name changed for some reason but Ati doesn’t know about it”. Not very solid logic, but at 1am it probably seemed like it.