But the big feature of human-level intelligence is not what it does when it is works but what it does when it's stuck.

Logic doesn't apply to the real world.

The brain happens to be a meat machine.

You don't understand anything unless you understand there are at least 3 ways.

One can acquire certainty only by amputating inquiry.

I bet the human brain is a kludge

Kubrick's vision seemed to be that humans are doomed, whereas Clarke's is that humans are moving on to a better stage of evolution.