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Is life a form of computation?

https://thereader.mitpress.mit.edu/is-life-a-form-of-computation/
47•redeemed•2h ago

Comments

ge96•2h ago
ha this is why it was read
gamerDude•2h ago
Of course. It's a computer designed to figure out the question of life, the universe and everything to which the answer is 42.
sedatk•2h ago
And the question is "what do you get if you multiply six by nine?"
jagged-chisel•2h ago
Showing that our concept of mathematics is slightly erroneous
ge96•2h ago
Throw this random question in, does DNA spell out sentience

Could you pull out the specific list of ATCG and make a brain

bgwalter•2h ago
From a neural networks professor:

https://www.inf.fu-berlin.de/inst/ag-ki/rojas_home/documents...

"However, we should be careful with the metaphors and paradigms commonly introduced when dealing with the nervous system. It seems to be a constant in the history of science that the brain has always been compared to the most complicated contemporary artifact produced by human industry [297]. In ancient times the brain was compared to a pneumatic machine, in the Renaissance to a clockwork, and at the end of the last century to the telephone network. There are some today who consider computers the paradigm par excellence of a nervous system. It is rather paradoxical that when John von Neumann wrote his classical description of future universal computers, he tried to choose terms that would describe computers in terms of brains, not brains in terms of computers."

I have no idea what the submitted MIT article is trying to say. Does the MIT article try to make the point that neural networks can be used for computation given ridiculous amounts of memory? They can, but that still does not explain real intelligence. Otherwise, the article makes the same mistakes as pointed out in the above quote.

logtempo•1h ago
To me, the article just ask "Is it possible to simulate living organism features?" and say a small yes by saying "Simulations like these show how computation can produce lifelike behavior across scales".

I'm not expert to judge the result of "drawing a missing hand by using neural network on each pixels"(if it's what it's done? Again not an expert).

karmakurtisaani•1h ago
I don't see the point of asking this question. Like, sure, all physical systems follow certain rules, so any such process will develop in a way that it look like a computation of an algorithm. Also, evolution itself is constantly optimizing organisms to best adapt to their environment, just like a computation.

So asking if life is a computation seems mostly like a semantic musing. Define "life" and define "computation", then see if they're the same.

measurablefunc•1h ago
Evolution is not optimizing anything. What's happening in the biosphere is a process of mutation & selection, it's not optimization towards any particular goal or objective. Furthermore & slightly more abstractly, b/c of conservation of mass & energy, what's actually happening is re-organization of existing biomass into different life forms enabled by solar radiation.
47282847•1h ago
Survival?
heavyset_go•37m ago
> what's actually happening is re-organization of existing biomass into different life forms enabled by solar radiation.

And the flux of geothermal and chemical energy

measurablefunc•11m ago
That's true. We wouldn't have fossil fuels w/o geological activity & mass churning.
nathan_douglas•31m ago
I suppose I fail to see why evolution through natural selection is not optimizing. That was Darwin's big idea, right? That given heredity, selection, and variation you end up with life forms we'd consider optimized for their environments?

Or do you mean that optimization by definition must include intent, and evolution as a mindless process has no intentionality?

I'm just not sure what you're driving at.

logtempo•1h ago
The title should definitely be "Is it possible to simulate living organism?" given the last sentence is "Simulations like these show how computation can produce lifelike behavior across scales".

Nothing about life is discussed here, it's not even defined once.

heavyset_go•41m ago
> Also, evolution itself is constantly optimizing organisms to best adapt to their environment, just like a computation.

There is no optimization, if organisms can reproduce, they'll continue to exist. That does not mean they are the "best adapted" or on a trajectory toward better adaptation.

It's entirely possible for a germ line to become less fit over time, even to the point of extinction, and that's still evolution. Time has shown that is the case for most germ lines.

rck•1h ago
This feels like the kind of popsci that's written for people who already agree with the author - there's nothing resembling an argument, or even a definition of "computation." There are nods to Church-Turing, but the leap from "every effectively calculable function is computable" to "life is a computation" is larger than anything you could fit in a book.
bgwalter•1h ago
I felt reminded of Hofstadter's Goedel/Escher/Bach mysticism that somehow everything is recursion.
anthk•1h ago
Self-simulation.
lawlessone•1h ago
> there's nothing resembling an argument, or even a definition of "computation."

"It's not even wrong" - Pauli

failingforward•1h ago
Yes, the article appears to be a short excerpt from a book and probably loses a lot of context because of that. I am interested in the questions raised by the author but will wait for the book to come out. The good news is that it appears the book will be open access - MIT Press seems to be encouraging this lately (at least by allowing this as an option for authors).
bwfan123•1h ago
there are criticisms of life as classical computation or in a more restricted context, cognition as computation [1] - one of which amounts to this: for any computation, there is a frame of reference in which that computation can be modeled, and if so, that frame of reference itself cannot be modeled by said computation.

[1] https://plato.stanford.edu/entries/computational-mind/#GodIn...

tolleydbg•1h ago
Only if you broaden the definition of computation to be so general it includes everything.
mallowdram•1h ago
The basic parameters of affective neuroscience make it difficult to conflate actions with computations. Because there isn't a content to thought, thoughts aren't about things, brains/CNS/bodies lack any units that could be computed, there's only an arbitrary sleight of hand linking life and computation.
quantum_state•1h ago
Physical phenomena seem to be algorithmic is an illusion, folks. We only have a model of the physical world. The model itself may be algorithmic.
rglover•1h ago
I think Federico Faggin has a much better (imo, coherent and well-considered) take on this [1].

[1] https://www.youtube.com/watch?v=0FUFewGHLLg

nis0s•1h ago
I like the idea instead that some biological components have deterministic optimizations because they’re closer to a molecular form, like DNA, RNA, some protein machinery, etc. because essentially these are driven by some kind of chemistry and physics. Whereas higher level, emergent biological forms are more stochastic in their function, like organelles, an organism, or populations, etc. In that sense, there’s no computation to life, more that life is constrained by the physics of the world in which it develops.

It’s likely if different life forms on another planet, it will have a different “computation” model because its defined by different physics that it experiences during evolution. Though I suppose there will some similarities depending on some fundamental rules of the universe. Will propagation molecules like RNA or DNA always look like helixes, or will the radiation or physics of another planet create another form of propagation molecule we haven’t yet observed. Might make for an interesting experiment to simulate.

modzu•1h ago
this question reminded me of the poetry of terrence mckenna. "Technology is the real skin of our species. Humanity, correctly seen in the context of the last five hundred years, is an extruder of technological material. We take in matter that has a low degree of organization; we put it through mental filters, and we extrude jewelry, gospels, space shuttles. This is what we do. We are like coral animals embedded in a technological reef of extruded psychic objects. All our tool making implies our belief in an ultimate tool. That tool is the flying saucer, or the soul, exteriorized in three-dimensional space."
amelius•1h ago
If true, will computers have rights?
Barrin92•1h ago
No, and this is a very philosophically confused post because it weirdly does not really give any definition of computation.

Computation really is a fancy word for calculation. What matters about computation is that its teleological. Computers are physical systems designed towards a particular end. A computer is, physically, no different than any other system. What differentiates it is that it's designed and we're interpreting its behaviour in a particular way.

Unless you're trying to make a grand theological argument in which "life" is taken to be some Hitchhikers Guide-like machination towards some end, it's not a computation. Life doesn't compute anything, the same way a falling pen doesn't compute gravity unless in a metaphorical sense.

The article is a pretty good example honestly of the problems of taking metaphors literally, common in the AI space where the author hails from. A similar case "artificial neurons" which are really metaphorical neurons. You have to be particularly careful when making comparisons between intentionally designed technological artifacts and biological and physical processes.

AIPedant•1h ago
Articles like this indicate we should lock down the definition of "computation" that meaningfully distinguishes computing machines from other physical phenomena - a computation is a process that maps symbols (or strings of symbols) to other symbols, obeying certain simple rules[1]. A computer is a machine that does computations.

In that sense life is obviously not a computation: it makes some sense to view DNA as symbolic but it is misleading to do the same for the proteins they encode. These proteins are solving physical problems, not expressing symbolic solutions to symbolic problems - a wrench is not a symbolic solution to the problem of a symbolic lug nut. From this POV the analogy of DNA to computer program is just wrong: they are both analogous to blueprints, but not particularly analogous to each other. We should insist that DNA is no more "computational" than the rules that dictate how elements are formed from subatomic particles.

[1] Turing computability, lambda definability, primitive recursion, whatever.

antegamisou•53m ago
I think the notion largely boils down to another dogmatic display of tech industry's megalomania.
ok_dad•39m ago
In what sense? I agree the tech industry fucking sucks right now, but I don't see how this has anything to do with that.

A physical computer is still a computer, no matter what it's computing. The only use a computer has to us is to compute things relative to physical reality, so a physical computer seems even closer to a "real computer" or "real computation" to me than our sad little hot rocks, which can barely simulate anything real to any degree of accuracy, when compared to reality.

jes5199•30m ago
our relationship to computation got weird when we moved to digital computers. Like, I don’t think anyone was saying “life is like millions of slide-rules solving logarithms in parallel”. but now that computers are de-materialized, they can be a metaphor for pretty much anything
Xcelerate•21m ago
> a computation is a process that maps symbols (or strings of symbols) to other symbols, obeying certain simple rules[1]

There are quite a number of people who believe this is the universe. Namely, that the universe is the manifestation of all rule sets on all inputs at all points in time. How you extract quantum mechanics out of that... not so sure

ants_everywhere•54s ago
I think you may be forgetting about analog computers https://en.wikipedia.org/wiki/Analog_computer
deadbabe•1h ago
If you believe in Dust Theory then yes life could be a form of computation where consciousness is just a pattern of discrete states.
ciroduran•51m ago
Douglas Adams had something to say about this, I think
anonymars•8m ago
I swear to you, at the moment I opened this there were 42 comments and your message was 42 minutes ago

Life is truly weird sometimes

nathan_douglas•43m ago
Classic John Von Neumann, inventing both the Von Neumann architecture and non-Von Neumann architectures.
matheusmoreira•42m ago
I love thinking about life as computation. Cells are computers, enzymes are functions, ribosomes are compilers, nucleic acids are source code...

Enzymes in particular are a lot like unix pipelines. An enzyme catalyzes its substrate's conversion into its product which is the substrate of another enzyme. When cells ingest glucose, it flows through the glycolysis metabolic pathway until it becomes pyruvate, and may be reduced even further depending on available resources. It's a huge pipeline of enzymes. They just kinda float around within the cell and randomly perform their tasks when their substrates chemically interact with them. No explicit program exists, it emerges from the system within the cell.

  Cell              - Computer
  Enzyme            - Function / Process / Filter
  Substrate         - Data
  Product           - Data
  Metabolic pathway - Program / Script
I've been playing in my mind with an idea for an esoteric programming language modeled around enzymes. The program defines a set of enzymes which are functions that match on the structure of data, automatically apply themselves to them and produce a modified version of the input which may in turn match against other enzymes. The resulting program metabolizes input by looping over the set of enzymes and continuously matching and applying them until the data is reduced to its final form. If no enzymes match, the output is the unmodified input.
heavyset_go•23m ago
I think the issue with this way of thinking is that humans think in abstractions.

Abstractions don't really exist, they're a product of the human mind, but then we apply them to nature. Calling DNA code, comparing NNs and the brain, etc. But those abstractions fall apart when you look a little too deeply at what actually happens in nature.

Is DNA code? Or is it more like a machine? Is it neither, or is it something embedded in such a complex space that our simple abstractions can't capture the full nature of its being?

When you look at the nature of DNA, it does more than simply act as code. It can edit and self-modify, self-assemble, self-replicate, it can turn genes on and off, it can perform what can be argued as computations itself. If you limit yourself to thinking of it as code, you might miss crucial ways it exists/performs in real life.

matheusmoreira•8m ago
> When you look at the nature of DNA, it does more than simply act as code.

> It can edit and self-modify, self-assemble, self-replicate, it can turn genes on and off

Unless my knowledge of biology is very outdated or incomplete, all of those things you cited are done to DNA. They don't happen spontaneously.

DNA doesn't self-replicate, a whole bunch of enzymes come and actively copy it. Genes don't spontaneously turn on and off, some enzyme comes and attaches or removes a methyl group. DNA doesn't self-assemble, it is actively coiled around histones to form nucleosomes. Bacteria have a huge variety of enzymes for manipulating native and foreign DNA, they have their own CRISPR mechanisms.

akomtu•39m ago
Computation is a terminal life form that barely resembles life at all.
Koshkin•22m ago
> terminal

Some prefer GUI

eig•12m ago
I'm not too impressed with this article since it doesn't really give a definition for computing, just picks a few similarities between what we see as computing (in the practical sense) and what cells do.

It's a shame because there *has* been a lot of deep work done on what kind of computer life is. People often use the Chomsky Hierarchy (https://en.wikipedia.org/wiki/Chomsky_hierarchy) to define the different types of computer vs automata. Importantly, a classical Turing machine is Type-0 on the Chomsky Hierarchy. Depending on what parts you include from a biological system, you could argue it's anywhere from Type-0 to Type-4.

Interestingly, the PhD thesis of well-known geneticist Aviv Regev was to show that certain combinations of enzymes with chemical concentration states are enough to emulate pi-calculus, and therefore are Turing machines! https://psb.stanford.edu/psb-online/proceedings/psb01/regev....

skayvr•8m ago
Reminds me of Wolfram's 'A New Kind of Science'. Specifically his principle of computation equivalence: https://en.wikipedia.org/wiki/A_New_Kind_of_Science#Principl...

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