Source: nitter, twitter

Transcribed:

Max Tegmark (@tegmark):
No, LLM’s aren’t mere stochastic parrots: Llama-2 contains a detailed model of the world, quite literally! We even discover a “longitude neuron”

Wes Gurnee (@wesg52):
Do language models have an internal world model? A sense of time? At multiple spatiotemporal scales?
In a new paper with @tegmark we provide evidence that they do by finding a literal map of the world inside the activations of Llama-2! [image with colorful dots on a map]

With this dastardly deliberate simplification of what it means to have a world model, we’ve been struck a mortal blow in our skepticism towards LLMs; we have no choice but to convert surely!

(*) Asterisk:
Not an actual literal map, what they really mean to say is that they’ve trained “linear probes” (it’s own mini-model) on the activation layers, for a bunch of inputs, and minimizing loss for latitude and longitude (and/or time, blah blah).

And yes from the activations you can get a fuzzy distribution of lat,long on a map, and yes they’ve been able to isolated individual “neurons” that seem to correlate in activation with latitude and longitude. (frankly not being able to find one would have been surprising to me, this doesn’t mean LLM’s aren’t just big statistical machines, in this case being trained with data containing literal lat,long tuples for cities in particular)

It’s a neat visualization and result but it is sort of comically missing the point

Bonus sneers from @emilymbender:

  • You know what’s most striking about this graphic? It’s not that mentions of people/cities/etc from different continents cluster together in terms of word co-occurrences. It’s just how sparse the data from the Global South are. – Also, no, that’s not what “world model” means if you’re talking about the relevance of world models to language understanding. (source)
  • “We can overlay it on a map” != “world model” (source)
  • froztbyte@awful.systemsEnglish
    16·
    1 year ago

    I… so. damn you, I looked.

    this says

    For spatial representations, we run Llama-2 models on the names of tens of thousands cities, structures, and natural landmarks around the world, the USA, and NYC. We then train linear probes on the last token activations to predict the real latitude and longitudes of each place

    their code does… a lot of things with that input data. including filling some in and conveniently removing “small” towns and some states and eliminating duplicates[1] and other shit

    a very quick glance at some of the input data:

    % xsv sample 5 uscities.csv| xsv table
city            city_ascii      state_id  state_name  county_fips  county_name  lat      lng        population  density  source  military  incorporated  timezone         ranking  zips                     id
Northglenn      Northglenn      CO        Colorado    08001        Adams        39.9108  -104.9783  37899       2056.3   shape   FALSE     TRUE          America/Denver   2        80260 80233 80234 80603  1840020192
East Gull Lake  East Gull Lake  MN        Minnesota   27021        Cass         46.3948  -94.3548   961         44.4     shape   FALSE     TRUE          America/Chicago  3        56401                    1840007720
Idaho Springs   Idaho Springs   CO        Colorado    08019        Clear Creek  39.7444  -105.5006  2044        318.7    shape   FALSE     TRUE          America/Denver   3        80452                    1840018790
Santa Rosa      Santa Rosa      TX        Texas       48061        Cameron      26.2561  -97.8252   2873        1373.2   shape   FALSE     TRUE          America/Chicago  3        78593                    1840023167
Mystic          Mystic          IA        Iowa        19007        Appanoose    40.7792  -92.9446   337         41.6     shape   FALSE     TRUE          America/Chicago  3        52574                    1840008316

    cool. so. we have high-precision data with actual coordinates and well-defined information. as the input. to the mash-things-together-into-a-proximates-slurry machine.

    and then on prompting the slurry with questions about “hey where is Wyoming”, it can provide a rough answer.

    amazing.

    [1] - whoops forgot the footnote. how about that Washingon in every state, huh? sure is a good thing the US doesn’t have lots of reused names!

    • Kichae@kbin.social
      10·
      1 year ago

      Wow. I was kinda tongue-in-cheeking it there, because I genuinely thought I was misinterpreting/over-simplifying the OP, but they really are trying to sell “it didn’t discard this data we explicitly fed it” as some kind of big deal.

      I was expecting this to be more like them discovering that regional dialects exist or soemthing dumb-but-not-that-dumb.

      • froztbyte@awful.systemsEnglish
        7·
        1 year ago

        promptfans, making grandiose badfaith claims that turn out so not-even-wrong it entirely moves the goalposts on the argument? nevarrrr

      • blakestacey@awful.systemsEnglish
        10·
        1 year ago

        15-ish years ago, I was doing a lot of principal component analysis and multi-dimensional scaling. A standard exercise in that area is to take distances between cities, like the lengths of airline flight paths, and reconstruct a map. If only I’d thought to claim that to be a world model!

      • blakestacey@awful.systemsEnglish
        7·
        1 year ago

        Whereas the electro-mechanical device that Turing built could perform just one code-cracking function well, today’s frontier AI models are approaching the “universal” computers he could only imagine, capable of vastly more functions.

        Fucking Christ, that hurt to read.