For practical purposes what does it matter? He is basically saying if humans cannot comprehend something like the fifth dimension then we couldn't build an AI t

For practical purposes what does it matter? He is basically saying if humans cannot comprehend something like the fifth dimension then we couldn't build an AI that could either. So what. I do believe humans could build a fusion reactor so a computer with expert level knowledge in all areas related to fusion reactors could build one thousands of times faster that it would take a human to do. So anything you think a human could do a high-level AI could do dramatically faster. So even if the AI could never construct something smarter than itself, it could make something faster, and in turn that AI could make one even faster. That is the singularity.