"I think the point at which I felt sure was when they told us that our short-range radio to Air Traffic Control had worked.  That's uniquely predicted by criminal masterminds.  There's no physical phenomenon that messes with all the radios except the ones you need to land.  That's the work of a mind that wants to mess with your comms for a few hours, but doesn't see a point in messing which your comms for an additional ten minutes at the price of maybe causing your plane to actually crash."

"I think the point at which I felt sure was when they told us that our short-range radio to Air Traffic Control had worked.  That's uniquely predicted by criminal masterminds.  There's no physical phenomenon that messes with all the radios except the ones you need to land.  That's the work of a mind that wants to mess with your comms for a few hours, but doesn't see a point in messing with your comms for an additional ten minutes at the price of maybe causing your plane to actually crash."