Comment by fc417fc802
21 hours ago
While your objection is technically correct it can still be useful (ie simple, straightforward, etc) to phrase things in terms of a goal. Since a goal (pursued by an intelligent being) and optimization pressure (a property of a blind process) are approximately the same thing in the end. In other words, Anthropomorphization can be useful despite not being true in a literal sense.
Certainly this can be misleading to the layman. The term "observer" in quantum mechanics suffers similarly.
No.
"Optimization pressure" makes it sound as if there is a single metric for optimization, whereas there are a constantly shifting set of different metrics. Worse (or more precisely, more complex) there are frequently multiple different "solutions" for a given metric, and evolution doesn't care. Put a little differently, there is no "optimization" pressure at all: evolution is not attempting to optimize anything (*).
Trying to fit anthropomorphized design onto a process that is absolutely the opposite of that in every way (no intent, multiple outcomes, no optimization) just leads people to not think clearly about this sort of thing.
(*) no, not even "reproductive fitness" - rates of reproduction are subject to massive amounts of environmental "noise", to the degree that minor improvements in offspring survivability will often be invisible over anything other than the very long term. Further, the most desirable rates of reproduction will also vary over time, leading to what once may have appeared to be an improvement into a liability (and vice versa, of course).
Right. It's extremely unlikely that "unable to synthesize Vitamin C" would ever have actively been selected for. But it was also unlikely to be strongly selected against in any version of humans or their near ancestors which have access to basically any common food.
So, randomly this pathway is deleted in our species, but there won't be a satisfying "just so" explanation, it's just blind luck. I happen to think we should fix it, most people either don't care or believe we shouldn't.
Framed in anthropomorphized terms this would look something like the goal of humans as a species is not the synthesis of vitamin C but rather mere survival. Walking a path where we come to depend on external sources is not necessarily at odds with that.
Or more generally: Why did I do that specific thing? No particular reason, it just happened to work. After all, I managed not to fall off the platform for another few seconds. No telling what the future will bring.
As long as we're thinking about anthropomorphization it's amusing to note that vitamin C synthesis can be framed as a species level tragedy of the commons. In that case you are simply advocating that we as a species make the responsible choice not to participate in a race to the bottom!
You're being overly literal. It's not "trying to fit anthropomorphized design onto a process" but rather "using anthropomorphization as a descriptive tool". This situation is not unlike when someone takes issue with an analogy due to erroneously interpreting it as a direct comparison.
> here are frequently multiple different "solutions" for a given metric
So too are there multiple different options when working towards any nontrivial goal in the real world. In the context of stochastic optimization the multi-armed bandit problem is a rather well known concept.
> evolution is not attempting to optimize anything
For the purpose of communication (of some other idea) it could be reasonable to say that the human race merely wants survival first and foremost. That is what evolution is after, at least in a sense. Of course that is not technically correct. Pointing out technical inconsistencies isn't going to convince me that I'm in the wrong here because I've already explicitly acknowledged their presence and explained why as far as I'm concerned objecting to them is simply missing the point.
Switching to a technical angle, to claim that evolution is not optimizing is to claim that water doesn't flow downhill but rather molecules just happen to vibrate and move around at random. It's completely ignoring the broader context. Evolution happens at a species level. It's an abstract concept inherently tied to other abstract concepts such as optimization and survival.
and you are missing my point that trying to help people understand a process that has no design element as if it was one that did actually does them (and the process) a disservice, possibly a great disservice.
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There is no broader context wherein natural selection can be considered to be an optimization process, that is a pernicious misconception of evolutionary theory. Fortunately, people with a computer science background have a distinct advantage towards correcting this fallacy, because their training affords them an understanding of information as a working concept that lay people rarely attain.
The key insight is that any algorithm implementation for a process which has an objective must, as an absolute minimal requirement, possess an encoding of that objective in its implementation. That is, a real representation of the goal must be in the process's make-up so that the goal can be pursued at all, because correct navigation requires assessing actions for whether they work towards the goal or not, and any such assessment requires meaningful reference to the goal. Without such a definition to refer to, differentiation between desirable and undesirable outcomes is impossible.
This goal encoding may be explicit (ie readily understandable by observers studying the implementation) or implicit (hard to parse), but either way, it must be instantiated in the make-up of the implementation, in some medium with the capacity to hold the goal definition, ie a way of storing the requisite number of bits within the implementation itself (or readily reading it from elsewhere, or constructing it from some combination thereof). This definition of the goal must be implemented in a manner that can be read and acted upon by the rest of the algorithm implementation, so that the system as a whole can pursue states that better match the goal. ie so that it can optimize.
With regards to evolution, how could nature select without having an idea of what it was selecting for? A reference definition of fitness must be available to nature if it is to measure each individual organism's fitness and select accordingly.
For a natural-selection-as-optimization-process algorithm implementation, there would need to be a component that encodes natural selection's optimization objective into the implementation's very make-up (or a ready way to read that goal from an external source).
What is the make-up of the natural selection algorithm's implementation? It is the entirety of nature itself, in whole and in part. Nature is literally everything in the universe, and literally anything in the universe, from the most massive galaxy to the smallest particle, can participate in natural selection events. And no part of nature, save for some animal brains, seems to contain a representation of a goal for natural selection.
Is it even conceivable that everything in the universe, down to the smallest particle, could encode a common goal? Does a volcano encode the goal of maximizing reproductive fitness for the populations living around it? Can a shower of cosmic rays encode the goal of making sure the creatures who's DNA it disrupts are the ones who should be removed from the populace? They don't appear to encode any such evolutionary goals, nor do they have the capacity to maintain any goal at all beyond following the physical laws of matter -- Volcanos are disordered piles of rock and churning lava, and cosmic rays are singular fundamental particles that are subject to wholesale transformation with every impact -- neither has any way of encoding a common objective for natural selection, nor is there evidence for them being able to collectively maintain one.
We can illustrate the paradox of an optimizing nature using your water molecule analogy. A collection of water molecules acting under a gravitational field will demonstrate downwards fluid dynamics which single molecules in space would not, but no matter how much H2O you put together, it will never spontaneously develop any concept of evolutionary fitness.
And yet a flash flood is a very real natural selection event that can reshape the genepool of a coastal town, but all the same it has no means of representing any goal of optimizing the population's fitness through who it drowns and who it spares; its just water. Flowing water performs natural selection, but it isn't optimizing for any goal, no matter how you try to spin it, because it has no way of maintaining a representation of a goal in its disordered and inconstant structure. It flows, yes, but it has no goal in doing so, its not pursuing any optimization objective, all the while it is a real instance of natural selection. It doesn't have or need any way of determining who is more or less fit than another, so how could it be optimizing for it? It's just flooding.
Whether its by deluge, an erupting volcano, a congenital heart attack, or a pack of rabid dogs, the processes making up natural selection events do not possess an encoding of a goal for natural selection. They do not possess the necessary information structure required to pursue a common optimization objective, and so they cannot be optimization processes in any meaningful sense.
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A more intuitive and natural phrasing, even though it's invalid in a technical sense. I've noticed this happens when people talk about computers/software as well ("it thinks the variable is set", "it freaks out if it doesn't get a response", etc). Outside of formal writing/presentations, using only technical terminology seems to take a suboptimal amount of effort for both speaker and listener compared to anthropomorphizing (unless, as you mention, the listener is a layman who gets the wrong idea).
It definitely is not useful. Your model should at least attempt to approximate reality, not to depart from it by putting effect before the cause. That way lies madness.
try telling that to quantum physicists... theyll just give you the wave function and say "well it works doesnt it"?
That's a bad take. I'm sure you can do a lot better than that.
It is not a model. It is a description. I'm torn on whether it would be correct to refer to the approach as constituting a sort of analogy.
No idea why you think the effect is being put before the cause. I'm hungry so I head to the kitchen. An observer says "he wants to eat". Antibiotics are administered. Only the bacterial cells expressing a certain set of proteins survive. An observer says "the infection wants to be resistant".
> An observer says "the infection wants to be resistant"
I can confidently claim that literally nobody says this because a google search for this exact phrase has only one result, and its this thread.[0]
Really though, I have never met a biologist who thought this way. All of the ones I've met and worked with knew that development of antibiotic resistance is not in any way like a decision process, and they usually understood on an intuitive level that bacterial cultures don't have a goal of developing the capability. Its just something that evolves, which is a distinct category of process.
Talking about it the other anthropomorphic way, like you claim is normal and acceptable, just confuses things; it is the opposite of helpful analogy. Infections don't "want" anything, they are better understood using the details of their actual biomolecular mechanics, which are about as far different from how brains work as could be imagined.
[0]https://www.google.com/search?q=%22the+infection+wants+to+be...
> An observer says "the infection wants to be resistant".
That's complete bs. Infections don't want anything. You're stuck in a loop of your own making, the only way out is to backtrack, not to keep on digging.
These lines of thinking were discredited many years ago and since then the field has seen enormous progress, anthropomorphize all you want but reality does not care.
It’s a useful start to move away from “it’s just random” but it’s just so different it doesn’t help in many cases. It’s not approximately the same.