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Is life a form of computation?

(thereader.mitpress.mit.edu)
222 points redeemed | 1 comments | 23 Sep 25 20:46 UTC | HN request time: 0s | source
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AIPedant ◴[23 Sep 25 22:19 UTC] No.45353525[source]▶
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.

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da_chicken ◴[24 Sep 25 00:26 UTC] No.45354643[source]▶
I don't think it's necessary to completely discard the idea. However, I do think it's important, at the end of it all, to ask: Okay, so what's the utility of this framework? What am I getting out of setting up my point of view this way?

I'm reminded of an old YouTube video [0] that I rewatched recently. That video is "Every Zelda is the Darkest Zelda." Topically, it's completely different. But in it Jacob Geller talks about how there are many videos with fan theories about Zelda games where they're talking about how messed up the game is. Except, that's their only point. If you frame the game in some way, it's really messed up. It doesn't extract any additional meaning, and textually it's not what's present. So you're going through all this decoding and framing, and at the end your conclusion is... nothing. The Mario characters represent the seven deadly sins? Well, that's messed up. That's maybe fun, but it's an empty analysis. It has no insight. No bite.

So, what's the result here other than: Well, that's neat. It's an interesting frame. But other than the thought to construct it, does it inform us of anything? Honestly, I'm not even sure it's really saying life is a form of programming. It seems equally likely it's saying programming is a form of biochemistry (which, honestly, makes more sense given the origins of programming). But even if that were so, what does that give us that we didn't already know? I'm going to bake a pie, so I guess I should learn Go? No, the idea feels descriptive rather than a synthesis. Like an analogy without the conclusion. The pie has no bite.

[0]: https://youtu.be/O2tXLsEUpaQ

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1. vidarh ◴[24 Sep 25 09:40 UTC] No.45358088[source]▶
The very immediate utility is that if life is computation, would be to tell us that life is possible to simulate, and that AGI is possible (because if there is no "magic spark" of life, then the human brain would be existence proof that a power and space- efficient computer capable of general intelligence can be constructed; however hard it might be).

If life is not a computation, then neither of those are a given.

But it has other impacts too, such as moral impacts. If life is a computation, then that rules out any version of free will that involves effective agency (a compatibilist conception of free will is still possible, but that does not involve effective agency, merely the illusion of agency), and so blaming people for their actions would be immoral as they could not at any point have chosen differently, and moral frameworks for punishment would need to center on minimising harm to everyone including perpetrators. That is hard pill to swallow for most.

It has philosophical implications as well, in that proof that life is computation would mean the simulation argument becomes more likely to hold.