Absolutely. I am completely convinced of the fact that there is knowledge that we can never possess simply because our minds aren't capable of understanding it. I mean nobody understands quantum theory. Some people can do the maths and make the right predictions etc, but they have absolutely no idea what's really going on. I think that's at the boundary of our understanding. Which means there's other stuff being the boundary, and other stuff way way beyond the boundary. But, I think that in the same way you can explain general relativity to a child in simple terms, if we produce AI that can grasp higher concepts, it could explain it to us.