An artificial neural network (such as the AI in question) is grounded in the same abstract mathematics that run our brains, sans all the erratic behaviour caused by hormones and the slow ion channels that cap our thinking speed.
The only thing we’re capable of, that an ANN can’t do yet, is spontaneity; and I’m pretty sure that this will be addressed in the future. That’s if you even consider a spontaneous AI to be a good thing, which most AI researchers don’t. Perhaps this lack of spontaneous behaviour (and consequently curiosity) is the reason AIs are still predictable/controllable.