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Joshua Loftus

@joft.bsky.social
1.9K followers 386 following 470 posts

Random wanderer, toddler parent, famous fitness influencer Statistics & Data Science Asst Prof at LSE (machine learning, causality, fairness, interpretability, ethics). First gen grad. Unschooled -> math @ WMich & Rutgers -> stats PhD @ Stanford

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Joshua Loftus @joft.bsky.social · 04/10/2026
This is possibly the most naive question anyone has ever asked me! You have a beautiful, innocent mind, don’t listen to me anymore
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Joshua Loftus @joft.bsky.social · 04/10/2026
Are you familiar with the concepts of “corporations,” “profit,” “engagement metrics“
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Joshua Loftus @joft.bsky.social · 03/10/2026
I didn't say all human research is insightful or creative! But at least human researchers have a point of view, some sense of direction, and are taking some risks when they try to publish their work
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Joshua Loftus @joft.bsky.social · 03/10/2026
The final output is something that may appear to have insight, creativity, or whatever, but if it actually had those things *it would not have needed* to generate thousands of other dead-end proofs and run tons of pointless simulations, etc
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Joshua Loftus @joft.bsky.social · 03/10/2026
Unpack what actually happens: 1) It's prompted, often with expert direction 2) It can search to pull in context about the specific problem, so transition probabilities are conditional on a lot of information provided by human experts 3) It burns through thousands of dollars until it gets lucky
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Joshua Loftus @joft.bsky.social · 03/10/2026
And if the transition probabilities have been learned from ~all text on the internet and ~all books, it's not surprising (and hence certainly not impossible) for the random symbol sequences to respect the same geographic constraints that exist in the world that generated the text
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Joshua Loftus @joft.bsky.social · 03/10/2026
I don't see what you're disagreeing about. Randomly stitching together words from a biology textbook has some probability of generating hypotheses that turn out to be scientifically useful.
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Joshua Loftus @joft.bsky.social · 03/10/2026
These are good for "verifiable domain" problems. And there will be some scientific/economic value found by generating orders of magnitude more code (though I doubt it will be anywhere near enough to justify current valuations) I don't think Stochastic Parrot critiques ever said this couldn't happen
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Joshua Loftus @joft.bsky.social · 03/10/2026
Some benchmark results imply that the likelihood of (5) has increased. Maybe that's good, but it doesn't mean we're no longer dealing with Stochastic Parrots. The same software product that can code (extremely inefficiently) can also generate more persuasive-sounding astrological charts
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Joshua Loftus @joft.bsky.social · 03/10/2026
Possibilities: 1) It hasn't actually done any ("independent") checks 2) It did check, but the check was wrong 3) It did check, correctly, but the report of the results is hallucinated 4) Check and report correct, but there are still other errors remaining it didn't find 5) All correct
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Joshua Loftus @joft.bsky.social · 03/10/2026
Claude now tells me something like: "Three independent check rounds each found errors in my [Claude's] drafts" OK, inference compute go brrr. How much should I trust a Stochastic Parrot that "checked" its own work... stochastically... and is--again, stochastically--reporting the results?
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Joshua Loftus @joft.bsky.social · 03/10/2026
This enabled large improvements on many benchmarks. Much wow, very frontier Does this mean that the SP criticism has become irrelevant? I don't think so. Here's one example to explain why:
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Joshua Loftus @joft.bsky.social · 03/10/2026
I would say, in increasing importance: (1) LLMs are bigger (~10x parameters), (2) "harnesses" and "tools" automate some of the context curation problem, (3) "inference time" computation -> generating many responses and automatically picking the best
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Joshua Loftus @joft.bsky.social · 03/10/2026
Re: the Stochastic Parrot (SP) arguments It's too tedious defending someone else's argument from people who are deliberately strawmanning it, so let's expand the scope a bit and consider the current high level debate What has fundamentally changed about "AI" now vs, say, ~3 years ago?
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Joshua Loftus @joft.bsky.social · 03/10/2026
Show me where her statements imply the “because they are incapable of solving it” part and I’ll accept I was wrong
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Joshua Loftus @joft.bsky.social · 03/10/2026
I didn’t see her say that arithmetic is impossible for LLMs, only that observing a proprietary, closed model isn’t evidence because it’s closed and there are incentives to patch anything that seems embarrassing in any way that would work
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Joshua Loftus @joft.bsky.social · 03/10/2026
This is also a strawman of what the Stochastic Parrot camp has been saying, but let’s not let good faith get in the way of a good social media dunk
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Joshua Loftus @joft.bsky.social · 02/10/2026
I would be surprised if Bender is actually arguing LLM arithmetic is impossible (rather than e.g. error prone) She is specifically denying that observing closed model capabilties is evidence about LLMs, and she’s right!
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Joshua Loftus @joft.bsky.social · 02/10/2026
it’s not even important for the stochastic parrot argument to deny the possibility of LLM arithmetic capability! There’s tons of worked examples of sequences of arithmetic operation symbols in the training data
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Joshua Loftus @joft.bsky.social · 02/10/2026
This is just standard academic insistence on accuracy (“pedantry”) Bender is correct and makes important points about not trusting claims about proprietary models If you want to say some LLM capability is genuine, you actually need better evidence than what‘s given here
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Joshua Loftus @joft.bsky.social · 02/10/2026
When someone is killed by car: this is normal, expected, inevitable really When someone is killed by a bike: we must investigate this immediately
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Joshua Loftus @joft.bsky.social · 02/10/2026
“AI” in education Is like a fire in a library
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Joshua Loftus @joft.bsky.social · 02/10/2026
You’re laughing but this is something a hidden internal portion of all AI models has to relearn from first principles every time you ask them to “run” some code and it costs billions of dollars in wasted gpu cycles
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Joshua Loftus @joft.bsky.social · 30/09/2026
Other people: ideologues Me: pure objectivity
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Joshua Loftus @joft.bsky.social · 29/09/2026
My conspiracy theory for why the "AI" CEOs are suddenly all in agreement about slowing down is that they already expect model improvement to plateau and want to say it's voluntary rather than hitting hard technological/statistical limits
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Reposted by Joshua Loftus
Ben Recht @beenwrekt.bsky.social · 29/09/2026
The illusion and politics of objectivity in cost-benefit analysis, a decision-making institution so ingrained that Americans can’t imagine life without it.
argmin.net
Pricing Commensurability
On the origins of cost-benefit analyses in governmental decision making
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Joshua Loftus @joft.bsky.social · 29/09/2026
You wouldnt regulate a fur baby would you? 🥺 👉👈
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Joshua Loftus @joft.bsky.social · 29/09/2026
The old world is dying, and the new world struggles to be born: now is the time of monsters… extremely cute monsters that culturally evolved to hijack our baby-preserving psychology
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Reposted by Joshua Loftus
the fool @agnoster.net · 29/09/2026
the future could be magnificent, and you deserve a share of it
Retro-futurist propaganda poster overlooking a radiant, green utopian city of rivers, bridges, gardens, and gleaming towers at sunrise. Four people and a shaggy dog sit on a flower-covered hillside, gazing toward the city. Across the sky in huge block lettering: “the future could be magnificent, and you deserve a share of it.”
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Joshua Loftus @joft.bsky.social · 29/09/2026
In half of the elections I will vote for whoever wants to drone strike migrant caravans, and in the other half I will vote for whoever promises to prosecute ICE agents. There are ~5 million other Americans exactly like me. We decide the outcomes of every election and there is no way to contact us
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Joshua Loftus @joft.bsky.social · 29/09/2026
MTG might be one of the most “median voter” representatives to ever be elected
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Joshua Loftus @joft.bsky.social · 28/09/2026
Always Sunny title meme: The gang goes out to eat
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Reposted by Joshua Loftus
James O’Loughlin @jamesoloughlin.bsky.social · 28/09/2026
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Joshua Loftus @joft.bsky.social · 27/09/2026
This is a good explanation for why my toddler is able to say "dowwwwnnn" with so much feeling
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Joshua Loftus @joft.bsky.social · 27/09/2026
There is no escaping the Pinker attraction state once you’ve started flirting with Reasonable Academic Centrism
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Joshua Loftus @joft.bsky.social · 26/09/2026
Rather disappointing to see such sloppiness from a scholar whose actual peer reviewed work and even(!) popular books were pretty respectable
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Joshua Loftus @joft.bsky.social · 25/09/2026
asking Claude to make this immediately
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Joshua Loftus @joft.bsky.social · 24/09/2026
We put a random number generator in our computer program, so, actually your honor, nobody can blame us for what it does
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Joshua Loftus @joft.bsky.social · 24/09/2026
Proof by counterexample: I have effed what I do, actually, all the time
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Joshua Loftus @joft.bsky.social · 23/09/2026
yes please 🥹
Email subject: Training with tendon injuries
Sent by: strongerbyscience.com newsletter
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Joshua Loftus @joft.bsky.social · 23/09/2026
This is how we can pretend every problem in the world is exactly like enterprise software development
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Joshua Loftus @joft.bsky.social · 22/09/2026
"dumb high school clique shit" is the 1st principal component of politics on social media
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Joshua Loftus @joft.bsky.social · 19/09/2026
If you tell them I sent you you will automatically be hired, guaranteed
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Reposted by Joshua Loftus
Mattan S. Ben-Shachar @mattansb.msbstats.info · 31/05/2026
Psychologists doing clustering be like: #statsmeme
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Joshua Loftus @joft.bsky.social · 18/09/2026
Yes
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Joshua Loftus @joft.bsky.social · 18/09/2026
FYI (and I’m not sure if Frank knows about this too) @f2harrell.bsky.social jmlr.org/papers/v24/2...
jmlr.org
Selective inference for k-means clustering
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Reposted by Joshua Loftus
Julia M. Rohrer @dingdingpeng.the100.ci · 15/09/2026
The question that’s dominating the field is not a causality question. It’s really, how can one sell a causal relationship while crafting the language so that there’s plausible deniability when somebody criticizes anything.
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Joshua Loftus @joft.bsky.social · 16/09/2026
Statisticians, data scientists, or similar nerds- come join my department! It's a great place to work, and it's in London! www.lse.ac.uk/statistics/a...
lse.ac.uk
Recruitment - Join us in the Department of Statistics!
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Joshua Loftus @joft.bsky.social · 15/09/2026
The President of the United States is a… President… of the United States
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Joshua Loftus @joft.bsky.social · 13/09/2026
Bsky libs competing over “The President of the United States is a [various criminal and other epithets]” But morally, just being POTUS is worse (more harmful) than any of the other things they say. The next person will also be a POTUS and also oversee an empire of extraction and planet destruction
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