1.The brain obeys the laws of physics.
2.The laws of physics are (in principle) computable.
3.Therefore, the brain is computable.
4.Therefore, human-level general intelligence is computable, and AGI is
inevitable and a question of time, power and compute.
This seems elegant, tidy, logically sound. And: it is patently false — at step 3… And this common mistake is not technical, but categorical:
Simulating a system’s physical behavior is not the same as instantiating its cognitive function.
Anyway: I agree. The paper certainly doesn't argue that AI is useless, but that autonomy in high-stakes domains is mathematically unsafe.
In the text, I distinguish between operating on an 'Island of Order' (where hallucinations are cheap and correctable, like fixing a syntax error in code) versus navigating the 'Fat-Tailed Ocean' (where a single error is irreversible).
Tying this back to your comment: If an AI hallucinates a variable name — no problem, you just fix it. But I would advise skepticism if an AI suggests telling your boss that 'his professional expertise still has significant room for improvement.'
If hallucinations are structural (as the Coq proof in Part II indicates), then 'living with them' means ensuring the system never has the autonomy to execute that second type of decision.