As others have said, I think this is a better argument against machines emulating humanness than it is against the broader category of "general intelligence".

As others have said, I think this is a better argument against machines emulating humanness than it is against the broader category of "general intelligence". For me it always comes down to: If we assume the human mind to be a physical, deterministic phenomenon, then an informational, deterministic system could simulate it. It's as simple as that. To take the brute-force route, every atom in a human body could be simulated, which would include its intelligence. Now, that says nothing about time-scale or practicality. It doesn't even say anything about whether electronic computers as we know them can achieve the physical density necessary to simulate something so complex, given the natural resources we have available. But in principle, unless you believe in the metaphysical, there's no denying that AGI is something that can exist.