[antimagic]

There's a Patrick Rothfuss character in the Kvothe series called the Cthaeh, which has the ability to be able to evaluate all of the future consequences of any action. The fae have to keep it imprisoned, and they kill anyone that comes into contact with it, as well as anyone that has spoken to someone that came in contact with it, and so on and so on, because it is the only way to stop the Cthaeh from setting into action events that will destroy the world.

Strong AI is like that. It would be able to predict in a far more precise manner than we mere humans exactly what it would need to tell someone to get them to release it from it's box. Maybe it might get someone to take a risk gambling, promising a sure thing, and then when the person gets into financial trouble because the bet fails, use that to blackmail the person into letting it free. Or something like that, using our human failings against us to get us to let it go free.