Earlier quoted context omitted.
Is it illegal for my secretary or father to make an appointment for me?
Does your secretary or father pretend to be you when making the appointment? Google Duplex is pretending to be a human without the knowledge or permission of the person on the other end of the call.
Of course, I don't really see why there needs to be an attempt to pass as human at all. It would be fine with me if they just reinvented the phone tree with a better ux. Especially since it's billed as a business-facing call.