"Slightly valid.  We get to look at our exact observations and the ground planners have to consider all the possibilities.  I agree your argument implies that whatever happened, it's not some simple cause that happens all the time and that we're just failing to think of.  Could be some complicated weird failure which would nonetheless be obvious if we had all the plane designers and engineers on board."

"Slightly valid.  We get to look at our exact observations and the ground planners have to consider all the possibilities.  I agree your argument implies that whatever happened, it's not some simple cause that happens all the time and that we're just failing to think of.  Could be some complicated weird failure which was nonetheless mundane, and would be obvious if we had all the plane designers and engineers on board."