scenario that would cause what appears to be a very cataclysmic event in the airplane that would cause all those systems to fail so suddenly which allows the airplane to fly along for another seven hours. that's the thing that's difficult to square. and i know richard continues to suggest that there's some sort of mechanical issue, but what is that mechanical scenario that makes that at all possible? >> what is the mechanical -- >> there are a variety of them out there. i agree, all of them have they have a weak point in them. every single one has a weak point, from fire in the bay, explosion of the oxygen tank that's also in that part the lithium batteries. there's a whole variety, a scenario of hypotheses. there's a variety of legitimate although as miles would point out, they do all have holes in them and the biggest hole is how does the plane keep flying? i can argue this either way. if there is a major fire how does it keep flying without falling out of the sky.