"How could an adult fool a child into allowing them to enter the child's house?" It's essentially this. We are talking about something that would be more intelligent than everyone, there are countless ways in which it could fool us. Especially once we start to build things we don't quite understand how it works. Like we won't just build the machine and kept locked forever with zero interaction with it, otherwise it would be useless. It all reminds me of the "Contact" movie scene where humans build a machine that they essentially didn't know how it worked, but which did..