and if there's an emergency? like the pitot tubes go out, or there's an engine fire, or a loss of cabin pressure, or landing gear malfunction, or stab trim runaway, or loss of communication, or GPS jamming over a hostile area, or TCAS alerts, or fuel contamination, or power failure, or the ground equipment for autoland goes out, or fire in the cargo hold, or slat deployment failure, or a bird strike on takeoff, or loss of hydraulic pressure, or a bad storm cell, or wind shear, or wake turbulence, or tower radio goes out, or a tail strike, or a badly contaminated runway, or a radio problem, or a software bug?