@ Chris Scott
Fair enough, my comment was general and not pointing to your concerns in particular. I agree there are many gaps and conjectures.
When I was referring to ONE scenario, I meant that it appears to be an established fact that the aircraft ended up in the SIO, and that only deliberate human input could have placed it there. Of course we do not know who took that deliberate action (we may speculate that a member of the crew was in the best position to do it, but we don't know), we do not know how the flight ended, etc. But this does rule out pretty much all of the exploding oxygen bottles and other nonsense that circulated here, which was the main point of my post.