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Yohan J John

@dryohanjohn

๐Ÿง  computational neuroscience | neurophenomenology 2.0? ๐Ÿค– Science Writer, Kempner Institute for the study of Natural and Artificial Intelligence at Harvard University (views here are my own)

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Latest posts by Yohan J John @dryohanjohn

Nice!

'Thirteen Ways of Looking at a Blackbird' might be my favorite poem.

06.03.2026 15:01 ๐Ÿ‘ 0 ๐Ÿ” 0 ๐Ÿ’ฌ 1 ๐Ÿ“Œ 0

He's so good. One the one hand superficial, but on the other, a compressed file of aphoristic insight.

26.02.2026 14:45 ๐Ÿ‘ 0 ๐Ÿ” 0 ๐Ÿ’ฌ 0 ๐Ÿ“Œ 0

What are they from? Two different books?

25.02.2026 21:21 ๐Ÿ‘ 0 ๐Ÿ” 0 ๐Ÿ’ฌ 1 ๐Ÿ“Œ 0
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Do you work or study in the fields of psychology, neuroscience, computer science, artificial intelligence, or philosophy?

What does the term 'representation' mean to you?

We invite you to participate in a brief survey on key conceptual questions across fields.

eu.surveymonkey.com/r/VX9GNXM

12.02.2026 13:39 ๐Ÿ‘ 66 ๐Ÿ” 60 ๐Ÿ’ฌ 4 ๐Ÿ“Œ 3

Seriously! I was so disappointed when I saw the painting after reading this.

19.02.2026 21:53 ๐Ÿ‘ 1 ๐Ÿ” 0 ๐Ÿ’ฌ 0 ๐Ÿ“Œ 0
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"This storm is what we call progress."
- Walter Benjamin

19.02.2026 20:44 ๐Ÿ‘ 3 ๐Ÿ” 0 ๐Ÿ’ฌ 2 ๐Ÿ“Œ 0

I've been inspired to become a founder of a new startup that develops brain-to-brain interface technology. It's called Talk. We're going to reinvent communication for the digital age.

The best part is that we're able to zero-shot transfer the full computational stack already used by your brain!

13.02.2026 20:08 ๐Ÿ‘ 104 ๐Ÿ” 8 ๐Ÿ’ฌ 6 ๐Ÿ“Œ 1

Just gonna leave this here.๐Ÿค“

3quarksdaily.com/3quarksdaily...

12.02.2026 12:42 ๐Ÿ‘ 0 ๐Ÿ” 0 ๐Ÿ’ฌ 0 ๐Ÿ“Œ 0

Supercharging the phenomenon of'searching where there's available light'? ๐Ÿ˜…

12.02.2026 12:04 ๐Ÿ‘ 10 ๐Ÿ” 4 ๐Ÿ’ฌ 1 ๐Ÿ“Œ 0
Newspaper cutting: The owls are not what they seem
ARLINGTON, North Military Road, 3000 block, 5:20 p.m.
Nov. 10. Responding to a call about an injured owl on the side of the road, an officer found a large mushroom.

Newspaper cutting: The owls are not what they seem ARLINGTON, North Military Road, 3000 block, 5:20 p.m. Nov. 10. Responding to a call about an injured owl on the side of the road, an officer found a large mushroom.

Morning Bluesky.

05.02.2026 07:57 ๐Ÿ‘ 971 ๐Ÿ” 159 ๐Ÿ’ฌ 50 ๐Ÿ“Œ 30
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Quilicura, Chile, one of the communities I wrote about in EMPIRE OF AI, has launched a brilliant initiative to inspire more responsible AI prompting. Today, don't use AI; ask the townspeople instead: quili.ai. So heartened to see this creative act of resistance.

31.01.2026 13:25 ๐Ÿ‘ 630 ๐Ÿ” 260 ๐Ÿ’ฌ 7 ๐Ÿ“Œ 16

Thanks! I'll have a look.

22.01.2026 21:28 ๐Ÿ‘ 1 ๐Ÿ” 0 ๐Ÿ’ฌ 0 ๐Ÿ“Œ 0

... what prevents us from hallucinating whenever we think of high-level concepts?

22.01.2026 20:04 ๐Ÿ‘ 1 ๐Ÿ” 0 ๐Ÿ’ฌ 1 ๐Ÿ“Œ 0

This is a huge and fun area for speculation! If I could directly activate a "little people" category-detector that is (presumably) in some higher order cognitive-visual area, would it lead to the subjective percept? Perhaps through top-down activation?

And if that *can* happen...

22.01.2026 20:04 ๐Ÿ‘ 1 ๐Ÿ” 0 ๐Ÿ’ฌ 1 ๐Ÿ“Œ 0

Good point. I am aware of some of these. The specificity is what I find striking here: little people are a highly particular sort of hallucination that presumably requires quite a bit of "hijacking" of low-level visual circuitry.

22.01.2026 17:54 ๐Ÿ‘ 1 ๐Ÿ” 0 ๐Ÿ’ฌ 1 ๐Ÿ“Œ 0
Preview
'They saw them on their dishes when eating': The mushroom making people hallucinate dozens of tiny humans Only recently described by science, the mysterious mushrooms are found in different parts of the world, but they give people the same exact visions.

"With L. asiatica, though, "the perception of little people is very reliably and repeatedly reported", Domnauer says."

Wild. The implications for human perceptual systems are... hard to wrap one's head around.

www.bbc.com/future/artic...

22.01.2026 15:08 ๐Ÿ‘ 5 ๐Ÿ” 0 ๐Ÿ’ฌ 2 ๐Ÿ“Œ 0

Animals used to be the one I listened to the least often... But it now just bubbles up in my consciousness regularly. Those guitar solos on Dogs.

And the keyboards on Sheep!

22.01.2026 13:41 ๐Ÿ‘ 2 ๐Ÿ” 0 ๐Ÿ’ฌ 1 ๐Ÿ“Œ 0

Meddle!

A taste for whimsical dogs, beaches, and epic monomythic journeys?

22.01.2026 13:35 ๐Ÿ‘ 1 ๐Ÿ” 0 ๐Ÿ’ฌ 0 ๐Ÿ“Œ 0

This point about professional inertia is spot on, and applies to pretty much every institution.

Structure is necessarily more long-lived and stable than function. What's not necessary is the degree to which institutional structure leads to individual cognitive hysteresis (e.g., in science).

22.01.2026 13:33 ๐Ÿ‘ 2 ๐Ÿ” 0 ๐Ÿ’ฌ 0 ๐Ÿ“Œ 0

My prediction / hope for 2026: this will be the year we start seeing the theoretical neuroscience and #NeuroAI fields start embracing spiking as something beyond a poor man's ReLU. Spikes aren't just the brain's activation function but they are fundamentally different.
1/

๐Ÿง ๐Ÿงช๐Ÿค–

01.01.2026 22:24 ๐Ÿ‘ 35 ๐Ÿ” 5 ๐Ÿ’ฌ 2 ๐Ÿ“Œ 1

the root of " #survive "
is "living-over"
and when I think about it
I have survived a good many things;
they have affected me,
yes,
they have torn me apart
the way ice tears potholes
from asphalt,
but I have lived over them
and laid fresh layers of life
over every crack,
no matter how wide.

#vss365

25.12.2025 17:28 ๐Ÿ‘ 10 ๐Ÿ” 3 ๐Ÿ’ฌ 0 ๐Ÿ“Œ 0

"However, as we lack a ground-truth understanding of how these complex models work, it can be hard to tell if our tools provide meaningful insights."

There's a disconcerting divergence between prediction accuracy and "explanation", broadly construed.

22.12.2025 19:16 ๐Ÿ‘ 9 ๐Ÿ” 1 ๐Ÿ’ฌ 0 ๐Ÿ“Œ 0

I am a great proponent of analogies in science, but I have gradually learned that the ability to jump from one analogy to another is perhaps more important than the ability to devise one in the first place: apprehending the latent invariant is the key phase transition, cognitively.

22.12.2025 17:52 ๐Ÿ‘ 4 ๐Ÿ” 2 ๐Ÿ’ฌ 0 ๐Ÿ“Œ 0

On the other hand, any conclusions we draw will have a very short shelf life, because the machines are in constant flux. Meanwhile, the ease with which one can do this research will sap the attention of researchers away from the harder work of understanding humans.

18.12.2025 18:18 ๐Ÿ‘ 35 ๐Ÿ” 3 ๐Ÿ’ฌ 1 ๐Ÿ“Œ 1

The belief that an LLM can help you write science reveals such magical thinking about language (and LLMs). If your writing is unclear, an LLM won't find its meaning hidden in the words. Only you can explain what you mean; the LLM does not read your mind. It completes with what *others* have written.

17.12.2025 08:27 ๐Ÿ‘ 133 ๐Ÿ” 20 ๐Ÿ’ฌ 4 ๐Ÿ“Œ 0
Self-Annihilating Sentences --- S. Gorn

"A formalist is a man who can't understand a theory unless it is meaningless."

Some real gems in Saul Gorn's "Compendium of Rarely Used Cliches":

noemata.net/last+fawned/...

14.12.2025 17:25 ๐Ÿ‘ 5 ๐Ÿ” 0 ๐Ÿ’ฌ 0 ๐Ÿ“Œ 0

My mind has still not fully processed the fact that Werner Herzog has an Instagram account.

14.12.2025 03:10 ๐Ÿ‘ 8 ๐Ÿ” 0 ๐Ÿ’ฌ 1 ๐Ÿ“Œ 0

It's really something. Also check out Cameron Winter's solo album.

14.12.2025 03:00 ๐Ÿ‘ 0 ๐Ÿ” 0 ๐Ÿ’ฌ 0 ๐Ÿ“Œ 0

Heard the #Geese album after a break of a few weeks. It already sounds like an old classic.

13.12.2025 18:39 ๐Ÿ‘ 2 ๐Ÿ” 0 ๐Ÿ’ฌ 1 ๐Ÿ“Œ 0