But there is nothing about understanding the difference between human and machine intelligence that is forbidden by any reason or logic that I am aware of.
Certainly there is a lot we don’t know about that topic. But unless that knowledge is specifically blocked by logic or the laws of physics, it is knowable. The only thing missing is the knowledge required to understand it.
The only source of knowledge is conjecture and criticism, and discussion with others is a great tool for that process. The more the better.
So unless you believe we know all there is to know about a topic right now, there is always the possibility that some new knowledge could help us get closer to the objective truth about it. And it’s guaranteed that new knowledge will come from creative new ideas and criticism of existing ideas.
Saying something is unknowable is akin to believing in a mysterious god creator, or fairies. But more importantly, it is a way to stop or limit the progress of our understanding of the universe. It’s like when parents say “because I said so”. It shuts down discourse and understanding and leads to closed societies.