But we know that the fundamental limitation of intelligence does not exist, nature has already created that with animal and eventually human intelligence via random walk. So 'AI will never exist' is lazy magical thinking. That intelligence can be self reinforcing is a good reason why AI will exist much sooner than later.

I actually agree with your premise of ruling out “not at all”. I was just responding to your characterization of “if ever”.

I’m not quite as certain as you are, though. Just because a technology is possible does not mean it is inevitable.