There's not necessarily a tough distinction between the type of intelligence an AI would possibly possess and human intelligence. "Artificial" designates the origin of the intelligence, not its properties essentially.
Since there is every reason to believe that human intelligence happened more or less naturally, instead of being meticulously designed by human-like agents, there does not appear to be any sense during which our intelligence may well be "artificial". If it is not natural, what is?
I could be conflating (computational) intelligence with consciousness, that is nonetheless to be outlined and drawn. So far, there's nothing to suggest that these two are aspects of a similar development, and one ought to additionally take into account the preconscious and unconscious factors relevant to human experience.
Consciousness isn't mattered of top-down software programming as if the brain were a hierarchical management station. Instead, we might imagine the creation of AI through microfabrication of neural networks, that permits for the bottom-up passage of code and knowledge.
Leading AI researchers have repeatedly tried and failed by reissuing the symbolic-descriptive, top-down approach that programmers use for software. That approach is as misguided to AI analysis because it is for unmanned drones or different such hardware, therefore the growing focus on light-based neural networks.
That could be understood as saying we all know what the advanced computational functions of the human brain are however we do not know how to code them. However, i believe it's even worse than that - we do not understand what computational functions cause consciousness. They could not also be 'complex' - nobody knows.
As somebody with a dominant leading towards non-dualistic materialism, I realise it annoying (and even perhaps worrying) that consciousness is therefore resistant to reductionism. If you can build an aware object (i.e. a brain) in a womb, why cannot you create one in a factory? If there's no reason why not then why is it we will not even see how to begin?