I remember reading that the flight control computers of the Airbus aircraft have logic pathways now so incredibly large that they cannot all be possibly checked in combination with themselves. Even simpler aircraft like the Boeing range can have their automatics doing very funny things such that you sit there saying 'what the hell's it doing?' before pressing the 'disengage' button and taking over manually to restore basic and human control over technology. Eventually the pilot will go, but not in our lifetimes! When the family in their shell suits are willing to climb into a pilotless aeroplane, our careers will be terminated, but persuading them that it is safe and sensible?.....Nahhh!