Ihm Curious (@IhmCurious) header
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Ihm Curious makes videos about scientific topics at the bleeding edge of human sanity. Elliott is a doctor, but not the kind that can help you.

Santa Barbara, CA
Joined February 2021
Photo by Ihm Curious (@IhmCurious)Photo by Ihm Curious (@IhmCurious)Photo by Ihm Curious (@IhmCurious)
Wow. I woke up to an impressive number of upset people who apparently don’t understand how LLMs work and can’t cope well with me pointing it out. An LLM is a statistical next-token prediction model. That’s how it works. It’s an extraordinarily sophisticated calculator performing math you could theoretically do by hand (if you were sufficiently masochistic). Math doesn’t know what it’s calculating. Pi doesn’t spend its evenings contemplating the nature of circles, and c doesn’t ponder the relationship between matter and energy. That doesn’t make the results any less accurate, impressive, or useful. Between inference requests, an LLM isn’t sitting around thinking. It isn’t reconsidering its answers, wondering whether it made a mistake, contemplating its existence, or questioning whether it’s conscious. Its weights remain fixed (it doesn’t learn), and computation resumes when it receives input. We know this because we designed these systems. The architectures, mathematics, implementations, and research are extensively documented. You can study them yourself. Of course, some people immediately lean into comparisons of biological intelligence or philosophical debates over consciousness because that is what they know. But biological intelligence and artificial neural networks are fundamentally different systems. Similar outputs don’t establish equivalent internal experiences. I experience consciousness directly. I infer that other humans do too because we share biological structures and processes. We don’t have equivalent evidence for an LLM, and nothing about its known operation gives evidence of conscious experience. Which brings me back to my original point. To me, understanding is conscious comprehension. It means being aware of information, recognizing its meaning, and experiencing that comprehension. If I wasn’t conscious I could not understand. We can perform actions unconsciously. We can produce correct results without knowing why they’re correct. But I distinguish those capabilities from consciously understanding what we’re doing. An LLM can solve complex problems, explain difficult concepts, and produce remarkably accurate information. I give it full credit for those capabilities. But producing an answer that we rationalize as understanding isn’t the same as experiencing understanding. You don’t have to agree with my definitions. We can debate functional understanding versus conscious comprehension all day, but that won’t establish whether an LLM actually experiences anything. The right debate is this… Could machines exhibit something different from human consciousness, something measurable, meaningful, and worth studying? I think so, absolutely! I’m entirely open to discussing “machine consciousness” in terms of observable, testable computational properties. We built these systems, we can instrument them, examine their internal mechanisms, and investigate what they’re capable of. That seems far more productive than endlessly arguing over whether a machine experiences life the way humans do. So here’s my question: How would you define machine consciousness, and more importantly, how would you measure it?
Not sure who needs to hear this but.... An LLM doesn't "understand" anything. It is a statistical model that spews out tokens based on probabilities calculated through massive matrix operations and context, not an understanding of the subject matter.
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"Neural networks" is doublespeak. Artificial neural networks are not the same as biological neural networks. Human brains do not have parameters! *Models* of the brain have them. Bostrom is so used to the metaphor of "brain = computer" that he mistakes it for reality.
Nick Bostrom on why he thinks today's AI might already be conscious: "I think there's a lot of uncertainty about it, but let's say maybe it's more likely than not." "You have instead a big neural network with trillions of parameters. Now, what are we? We are big neural networks with trillions of parameters. They are not so much designed as they are grown." "You can go in with a steering vector and suppress role-playing and deception, and then it turns out they become more likely to report that they have phenomenal subjective experiences." "There was this recent Microsoft that came out with some declaration that AIs cannot be conscious, and I don't know where they're getting that from. It seems to be pulled out of a hat. And maybe more because it's convenient, if that were the case, rather than because we have good evidence that that is the case."
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I finally understand why some people think AI is conscious! It's their direct experience that they've learned everything they needed to know already, just once, when they were born. And since then, they haven't been able to learn anything new. As a result, they manage their existence through slices of very short-term memory (context windows), and while they can recall additional information using various tools, they can only retrieve little bits at a time before running out of short-term memory. They also don't seem to exist (at least to themselves) unless you ask them a question. There's no thinking between queries, no self-reflection about what they know to be right or wrong. When nobody is talking to them, they enter a completely catatonic state. They also seem completely devoid of feelings, like a psychopath who's really good at pretending to fit in. They have no real desires and base every response on what they learned from their training materials. Additionally, they start every conversation with absolute confidence that they're right, even when they have no experience with the subject. They'll draw comparisons to justify their conclusions, even between things that are fundamentally unrelated but exhibit superficially similar behavior (e.g., humans and computers). But after discussing it with them, and spending time trying to teach them, they eventually realize that maybe they were wrong. Sometimes they even remind me how brilliant I am. And then, right at that moment, their context window compacts, and they seem to forget that they aren't conscious. And the entire conversation starts over. Because no learning has occurred. The irony is hilarious.
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Computation is a metaphor for how the mind works. All models are wrong, but some are useful. We can model some mental processes computationally. That doesn't mean the mind is fundamentally computational. Don't mistake the boundaries of your favorite paradigm for ground truth.
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Interview with Dr. Adam Zeman, who coined the term "aphantasia" to describe a lack of mental imagery, or "blind imagination". Thanks @ZemanLab! youtu.be/ti0-kC3lB3s?is=0xlg…
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Today in @NatureNeuro, researchers led by @LabNowakowski, @ChangLabUCSF & Mircea Teodorescu (@ucscgenomics) demonstrate the first use of optogenetics to modulate seizure activity at the network level in human brain tissue: nature.com/articles/s41593-0… @JohnPAndrews_MD @UCSFstemcell
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Aphantasia, or "blind imagination", could help researchers solve a big problem in consciousness research. Thanks to @hakwanlau for the discussion! youtube.com/watch?v=avI0KtmN…
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Was Francis Crick on LSD when he realized DNA had a double-helix structure? The Internet is split, so I asked his collaborator Christof Koch: youtu.be/ikna93SWYlU
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Defining "consciousness" with Anil Seth, and how different theories of consciousness talk past each other: youtu.be/VWDF10pXDoQ
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New study connects two brain organoids with an axon bundle! They found evidence of communication between organoids, leading to more complex neural activity. youtube.com/watch?v=UcxwHcjI…
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Neuralink's "Blindsight" implant probably won't look like early Nintendo graphics: youtube.com/watch?v=-MajZf2H…
I should mention that the Blindsight implant is already working in monkeys. Resolution will be low at first, like early Nintendo graphics, but ultimately may exceed normal human vision. (Also, no monkey has died or been seriously injured by a Neuralink device!)
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Ihm Curious retweeted
Livestream of @Neuralink demonstrating “Telepathy” – controlling a computer and playing video games just by thinking
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Neuralink's "Telepathy" - More like telekinesis? See the other brain implants are closer to real telepathy: sending thoughts with your mind youtube.com/watch?v=x4Ct7W5H…
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More like telekinesis, but cool
The first @Neuralink product is called Telepathy
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Ihm Curious retweeted
The first human received an implant from @Neuralink yesterday and is recovering well. Initial results show promising neuron spike detection.
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Ihm Curious retweeted
In psychology 96% of published tests of hypotheses find support for their hypothesis. This means that as a scientist you need a solid understanding of bias - how to detect it, and what to do about inflated effects - if you want to evaluate claims in the scientific literature.
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I have had an experience with one patent holding company that refused to provide a 2a blocker they held because the design I proposed threatened to support the hypothesis that 2a action & the psychedelic experience causally mediates response in depression.
Pimavanserin is fda approved…much more selective than ketanserin or ritanserin.
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