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Culture War Roundup for the week of April 28, 2025

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On the plausibility of Mars Bases vs that of AI

Responding to @FeepingCreature from last week:

Out of interest, do you think that a mars base is sci-fi? It's been discussed in science fiction for a long time.

I think any predictions about the future that assume new technology are "science fiction" p much by definition of the genre, and will resemble it for the same reason: it's the same occupation. Sci-fi that isn't just space opera ie. "fantasy in space", is inherently just prognostication with plot. Note stuff like Star Trek predicting mobile phones, or Snowcrash predicting Google Earth: "if you could do it, you would, we just can't yet."

That was a continuation of this discussion in which I say of AI 2027:

It is possible that AGI happens soon, from LLMs? Sure, grudgingly, I guess. Is it likely? No. Science-fiction raving nonsense. (My favorite genre! Of fiction!)

As to Mars:

Most of what I know here comes from reading Zach Wiener-Smith (of SMBC)'s A City on Mars. It was wildly pessimistic. For a taste, see Gemini chapter summaries and an answer to:

"Given an enormous budget (10% of global GDP) and current tech, how realistic is a 1 year duration mars base? an indefinite one? what about with highly plausible 2035 tech?"

I agree with the basic take there, both as a summary of the book and as a reflection of my broader (but poorly researched) understanding/intuition of the area: Mars is not practical. We could probably do the 1 year base if we don't mind serious risk of killing the astronauts (which, politically, probably rules it out. Maybe Musk will offer it as a Voluntary Exit Program for soon-to-be-ex X SWEs?)

My main interesting/controversial (?) take: there is an important sense in which Mars bases are much less of baseless scifi nonsense than AI 2027.

Mars is a question of logistics: on the one hand, building a self-contained, O2 recycling, radiation hardened, etc, base requires tech we may (?) not quite have yet. On the other hand, it strikes me as closer to refinements of existing tech than to entirely new concepts. Note that "enormous budget" is doing a lot of work in here. I am not saying it is practical to expect we will pay to ship all of this to Mars, or risk the lives, just that there is good reason to believe we could.

AI is a question of fundamental possibility: by contrast, with AI, there is no good reason to think we can create AI sufficient to replace OpenAI-grade researchers with forseeable timelines/tech. Junior SWEs, maybe, but it's not even clear they're on average positive-value beyond the investment in their future (see my previous rant about firing one of ours).

I don't understand how anyone can in good faith believe that even with an arbitrary amount of effort and funding, AGI, let alone ASI, is coming in the next few years. Any projection out decades is almost definitionally in the realm of speculative science-fiction here. Even mundane tech can't be predicted decades out, and AI has higher ceilings/variance than most things.

And yet, I am sensitive to my use of the phrase "I don't understand." People often unwittingly use it intending to mean "I am sure I understand." For example: "I don't understand how $OTHER_PARTY can think $THING." This is intended to convey "$OTHER_PARTY thinks $THING because they are evil/nazis/stupid/brainwashed." But, the truth of their cognitive state is closer to the literal usage: they do not understand.

So, in largely the literal sense of the phrase: I do not understand the belief in and fear of AI progress I see around me, in people I largely respect on both politics and engineering.

We know that systems capable of acting like smart humans are possible (after all, there are smart humans). Will LLMs get us there? It's unclear. Could they, in the arid sense that there is some unknown collection of weights that would be capable of outputting tokens that simulate an OpenAI researcher working on novel tasks? Absolutely. (As to how to actually learn those weights, that's left as an exercise to the reader.)

I think the dynamism of the research program is relevant, though. Right now, you can, as an individual, decide to spend a quarter and a couple thousands in compute to research a particular area of LLMs and have a reasonable expectation of finding something interesting, and sometimes it's actually useful. This isn't merely hypothetical but is something happening every single day. There is a lot of low hanging fruit. Might there be some collection of a dozen different improvements on the horizon which, when taken collectively, would get us to AGI? Maybe. It's plausible, at least, while it's not plausible that a dozen different innovations are on the horizon that would enable a cheap base on Mars.

Could they, in the arid sense that there is some unknown collection of weights that would be capable of outputting tokens that simulate an OpenAI researcher working on novel tasks? Absolutely

Why so confident? A 10 dimensional best fit line obviously won't work, nor will a vast fully connected neural net - so why should an LLM be capable?

I mean it in the sense that LLMs are capable of creating a token stream that is identical to an AI researcher. This is mathematically proven--see various universality theorems--but has the critical drawback that it doesn't really give you any information on how to find that optimal set of weights.

A MLP absolutely could also do this, or even some absurd polynomial best fit (not, however, a ten or quadrillion dimensional linear model). What MLPs offer over polynomials and transformers offer over MLPs is increased training efficiency and stability for actually finding those weights.

The universality theorems don't say that it's possible with any remotely practical number of weights, even aside from training time. But yes, I do grant that they say it is possible in theory.

To even achieve GPT2 performance with a basic, non-recurrent neural net, I would not be surprised if you need > # of atoms in the universe weights, which clearly isn't physically possible. (Ok, you can maybe theoretically have > 1 weight per atom, but s/atom/gluon, or just don't take me super literally on "atom".)