Chris Adami
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chrisadami.bsky.social
Chris Adami
@chrisadami.bsky.social
Professor at Michigan State University. Trying to understand how the universe works, including people and animals. And plants and microbes. So, pretty much everything. (he/him)
I later found out that biology is not, in fact, boring. But you can certainly teach it in the most boring manner possible.
November 23, 2025 at 2:11 AM
Oh, no doubt about it. The proof that channels have a finite capacity was a huge breakthrough. It’s just odd that he hadn’t seen the formula before. He reinvented it and used it very differently
November 21, 2025 at 10:45 PM
And here is p. 125 of my copy of Planck's "Wärmestrahlung" (1905). He even does "max entropy". But I think von Neumann had understood this more deeply, because by realizing it is the classical limit of the vN entropy, it was not at all limited to phase space probabilities, but any states, really.
November 21, 2025 at 7:34 PM
This is the way.
November 21, 2025 at 4:21 PM
You should also tell them that when Shannon came to him in 1946 or so to ask what he should call his p log p formula, he told him to call it entropy, but not telling him that he already wrote down that formula as the classical limit of the vN entropy in 1927. "It has been used under that name".
November 21, 2025 at 4:21 PM
Brown nose by proxy
November 21, 2025 at 5:29 AM
But they forget that every mutation can change the fitness effect of every other mutation via epistatic interactions. So, you don't need to invoke rapidly changing environments: every mutation coming after a beneficial mutation within the fixation time window can change the adaptive trajectory 2/2
November 17, 2025 at 3:17 PM
That's basically the plot of "Satanic Verses" (the part about the puppet, not the AI).
November 7, 2025 at 3:26 AM
Once you've done all this you can come back and use my info-theoretic tool, which will just extract the information. But you need to know information about *what* (i.e., annotated phenotype). That tool (IDSeq) does it better than any ML tool in existence, here or anywhere else in the universe.
November 3, 2025 at 3:07 PM
But you can actually binarize the byte, and you can do the same with your abundances (turns out the organism only cares about high/low info). Here, the ten classes (numbers) will be immediately apparent, but if you know the phenotype on a subset, you can use that for training.
November 3, 2025 at 3:07 PM
Here's a description of dimensionality reduction techniques for hand-written images. The images are both simpler and more complex than the microbiome: there are 782 "abundances", but each has a range of one byte. colah.github.io/posts/2014-1...
Visualizing MNIST: An Exploration of Dimensionality Reduction - colah's blog
colah.github.io
November 3, 2025 at 3:07 PM
How many biomes? What do you want to predict if you knew the patterns?
November 3, 2025 at 1:58 PM
Approximate cloning is totally allowed.
October 31, 2025 at 10:07 PM
I have been complaining about this many times. I try to submit to journals with active editors (who are involved in the decision making and don’t just count balls and strikes). But with varying success.
October 28, 2025 at 7:36 PM
This is because pain is a construct of our brain. A pain signal and a pleasure signal (say) look the same as far as the spike train goes. So you can do this if you can simulate the brain. Good luck with that.
October 15, 2025 at 10:30 PM
Ummm.
October 6, 2025 at 4:21 AM