Some people, for example medics and civil engineers, are held legally liable for the decisions that they make. If they are to use machines that help them make t

Some people, for example medics and civil engineers, are held legally liable for the decisions that they make. If they are to use machines that help them make those decisions (and mostly they would like to due to the terrible business of killing people) then they have to be able to understand what they are being told to do, or they have to trust it enough to bet their futures on it. If the machine is literally infallible then you can imagine option b being exercised, but being honest, if you were being threatened with five years of jail and you didn't understand why it was telling you to do something would you sign it off?