Brain-Computer Debate

Comments debate whether human brains are computers, Turing complete, or simulable by digital systems, challenging analogies between biological brains and computational machines.

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Keywords

e.g AI www.cs EWD1036 EWD utexas.edu ARE HBP CRISPR i.e brain human brain computer turing human brains computation computers turing machine compute

Sample Comments

jakeogh Apr 23, 2024 View on HN

I bet never. Brains are not computers.https://news.ycombinator.com/item?id=39751509https://news.ycombinator.com/item?id=9885558https://news.ycombinator.com/item?id=21253267

danaris Dec 12, 2025 View on HN

"LLMs cannot think like brains" does not imply "no computer it will ever be possible to construct could think like a brain".

andrepd Aug 17, 2016 View on HN

This is almost comical :p The brain is not a turing machine. You can't make these kind of analysis because the brain isn't just a huge von neumann computer.

didericis Sep 14, 2022 View on HN

That’s a really deep question. If our brains are like digital computers, then yes, that’d be true. But they could be like analog computers, quantum computers, or something we don’t yet have the ability to describe.

otabdeveloper1 Jun 1, 2019 View on HN

You're making a category error. Human brains aren't computers. They do not "compute" at all.

TaupeRanger Jul 7, 2021 View on HN

Hint: it has been said hundreds of times since the advent of computer science that the brain is "just" [some simple thing that we already understand]. That notion has never once helped us in any way.

aSanchezStern May 21, 2024 View on HN

This is a particular philosophical conjecture, not a proven scientific fact. We don't understand enough about the human brain to prove whether it is fundamentally different from a very complex computer.

spuz Nov 28, 2017 View on HN

You are still making the assumption that the brain is a computer. Is there any theoretical proof that our brains are a permutation of a Turing machine? That to me would seem to be the first step towards your conclusion.

famouswaffles Jan 22, 2026 View on HN

Why do you think you can't execute the computations of the brain ?

adrianN Apr 27, 2017 View on HN

What can a real brain do that a simulated brain can't?