Tiago Peixoto
@tiago.skewed.de
Statistical mechanic, secular Bayesian.
Prof. of Complex Systems and Network Science @ IT:U, Austria
Head of the “Inverse Complexity Lab”.
@invcomplexity.skewed.de
https://skewed.de/lab
Prof. of Complex Systems and Network Science @ IT:U, Austria
Head of the “Inverse Complexity Lab”.
@invcomplexity.skewed.de
https://skewed.de/lab
Pinned
Double feature, just out on @royalsocietypublishing.org:
"Uncertainty quantification and posterior sampling for network reconstruction"
Previous explainer thread here: bsky.app/profile/tiag...
Code here: graph-tool.skewed.de/static/docs/...
royalsocietypublishing.org/doi/10.1098/...
"Uncertainty quantification and posterior sampling for network reconstruction"
Previous explainer thread here: bsky.app/profile/tiag...
Code here: graph-tool.skewed.de/static/docs/...
royalsocietypublishing.org/doi/10.1098/...
Reposted by Tiago Peixoto
You know what they say about academics...
"causal" in the streets
"preliminary and hypothesis-generating" in the sheets
"causal" in the streets
"preliminary and hypothesis-generating" in the sheets
November 12, 2025 at 11:16 PM
You know what they say about academics...
"causal" in the streets
"preliminary and hypothesis-generating" in the sheets
"causal" in the streets
"preliminary and hypothesis-generating" in the sheets
“Metros reduce car use in European cities but trams do not”
The conclusion says: “Although cities with a metro tend to
have a higher share of B, it is unclear whether the presence itself causes people to shift to B, and no causal claims can be made.”
Then, why make a causal claim in the title? 🤷♂️
The conclusion says: “Although cities with a metro tend to
have a higher share of B, it is unclear whether the presence itself causes people to shift to B, and no causal claims can be made.”
Then, why make a causal claim in the title? 🤷♂️
I analysed the modal share of nearly 400 European cities, comparing those with a metro, only a tram, and without any rail system.
Large cities with a metro have roughly half the car share of cities served only by a tram.
www.nature.com/articles/s44...
Data: CitiesMoving.com
Large cities with a metro have roughly half the car share of cities served only by a tram.
www.nature.com/articles/s44...
Data: CitiesMoving.com
November 11, 2025 at 9:48 AM
“Metros reduce car use in European cities but trams do not”
The conclusion says: “Although cities with a metro tend to
have a higher share of B, it is unclear whether the presence itself causes people to shift to B, and no causal claims can be made.”
Then, why make a causal claim in the title? 🤷♂️
The conclusion says: “Although cities with a metro tend to
have a higher share of B, it is unclear whether the presence itself causes people to shift to B, and no causal claims can be made.”
Then, why make a causal claim in the title? 🤷♂️
Reposted by Tiago Peixoto
A statistic that concentrates the mind: In the first 6 months of 2025, China installed 250 GW of solar power capacity. This is around 150% of France's aggregate electricity production...
November 11, 2025 at 8:27 AM
A statistic that concentrates the mind: In the first 6 months of 2025, China installed 250 GW of solar power capacity. This is around 150% of France's aggregate electricity production...
Firing a BBC director for *leftist* bias is like punishing a pig for taking a bath.
Tim Davie resigns as BBC director general after accusations of ‘serious and systemic’ bias in coverage
Tim Davie resigns as BBC director general after accusations of ‘serious and systemic’ bias in coverage
Davie tells staff departure was “my own decision” but it comes with the BBC preparing to apologise for the way it edited a Trump speech
Tim Davie, the BBC’s director general, and the head of BBC News have resigned after a former adviser to the corporation accused it of “serious and systemic” bias in its coverage of issues including Donald Trump, Gaza and trans rights.
In a shock move, Davie said his depature was his own, but comes with the BBC preparing to apologise for the way the broadcaster edited a Donald Trump speech. Continue reading...
www.theguardian.com
November 9, 2025 at 7:22 PM
Firing a BBC director for *leftist* bias is like punishing a pig for taking a bath.
A team of 42 researchers lead by Oxford finds that bears do, in fact, defecate in the woods.
www.oii.ox.ac.uk/news-events/...
www.oii.ox.ac.uk/news-events/...
OII | Study identifies weaknesses in how AI systems are evaluated
Largest systematic review of AI benchmarks highlights need for clearer definitions and stronger scientific standards.
www.oii.ox.ac.uk
November 9, 2025 at 9:33 AM
A team of 42 researchers lead by Oxford finds that bears do, in fact, defecate in the woods.
www.oii.ox.ac.uk/news-events/...
www.oii.ox.ac.uk/news-events/...
James Watson is perhaps the greatest cautionary tale of where the competitive narcisism that poisons science can lead.
www.statnews.com/2025/11/07/j...
www.statnews.com/2025/11/07/j...
James Watson, dead at 97, was a scientific legend and a pariah among his peers
James Watson, the co-discoverer of the structure of DNA who died Thursday at 97, was a scientific legend and a pariah among his peers.
www.statnews.com
November 9, 2025 at 8:08 AM
James Watson is perhaps the greatest cautionary tale of where the competitive narcisism that poisons science can lead.
www.statnews.com/2025/11/07/j...
www.statnews.com/2025/11/07/j...
Very good post. I very much agree with the overall position.
How can we reform science? I have some ideas. But I am not sure you’ll like them, because they don’t promise much. elevanth.org/blog/2025/07...
Which Kind of Science Reform
What hope is there for science reform, if we can't agree on what to reform? Right now, principles are more important than practices.
elevanth.org
November 8, 2025 at 11:38 AM
Very good post. I very much agree with the overall position.
Nowadays, often the justification for choosing M$ is that it claims to be GDPR compliant, which just means that M$ can afford getting sued for any breach, which of course happens all the time. And universities don't care about potential breaches themselves, only about liability, which M$ absorbs.
We had this discussion 25 years ago.
A colleague calculated that they could hire a full-time administrator for Linux instead of paying the MS licences. Most thought of it as absurd idea ;-)
A colleague calculated that they could hire a full-time administrator for Linux instead of paying the MS licences. Most thought of it as absurd idea ;-)
November 6, 2025 at 4:11 PM
Nowadays, often the justification for choosing M$ is that it claims to be GDPR compliant, which just means that M$ can afford getting sued for any breach, which of course happens all the time. And universities don't care about potential breaches themselves, only about liability, which M$ absorbs.
Reposted by Tiago Peixoto
lol
November 6, 2025 at 4:47 AM
lol
Double feature, just out on @royalsocietypublishing.org:
"Uncertainty quantification and posterior sampling for network reconstruction"
Previous explainer thread here: bsky.app/profile/tiag...
Code here: graph-tool.skewed.de/static/docs/...
royalsocietypublishing.org/doi/10.1098/...
"Uncertainty quantification and posterior sampling for network reconstruction"
Previous explainer thread here: bsky.app/profile/tiag...
Code here: graph-tool.skewed.de/static/docs/...
royalsocietypublishing.org/doi/10.1098/...
November 5, 2025 at 8:15 AM
Double feature, just out on @royalsocietypublishing.org:
"Uncertainty quantification and posterior sampling for network reconstruction"
Previous explainer thread here: bsky.app/profile/tiag...
Code here: graph-tool.skewed.de/static/docs/...
royalsocietypublishing.org/doi/10.1098/...
"Uncertainty quantification and posterior sampling for network reconstruction"
Previous explainer thread here: bsky.app/profile/tiag...
Code here: graph-tool.skewed.de/static/docs/...
royalsocietypublishing.org/doi/10.1098/...
Just out on @royalsocietypublishing.org:
"Scalable network reconstruction in subquadratic time"
royalsocietypublishing.org/doi/10.1098/...
Previous explainer thread here: bsky.app/profile/tiag...
Code here: graph-tool.skewed.de/static/docs/...
"Scalable network reconstruction in subquadratic time"
royalsocietypublishing.org/doi/10.1098/...
Previous explainer thread here: bsky.app/profile/tiag...
Code here: graph-tool.skewed.de/static/docs/...
November 5, 2025 at 8:11 AM
Just out on @royalsocietypublishing.org:
"Scalable network reconstruction in subquadratic time"
royalsocietypublishing.org/doi/10.1098/...
Previous explainer thread here: bsky.app/profile/tiag...
Code here: graph-tool.skewed.de/static/docs/...
"Scalable network reconstruction in subquadratic time"
royalsocietypublishing.org/doi/10.1098/...
Previous explainer thread here: bsky.app/profile/tiag...
Code here: graph-tool.skewed.de/static/docs/...
The work conditions in academia are rapidly deteriorating, but at least we still have academic freedom. 🫠
www.theguardian.com/education/20...
www.theguardian.com/education/20...
UK university halted human rights research after pressure from China
Exclusive: Leading professor at Sheffield Hallam was told to cease research on supply chains and forced labour in China after demands from authorities
www.theguardian.com
November 4, 2025 at 10:33 AM
The work conditions in academia are rapidly deteriorating, but at least we still have academic freedom. 🫠
www.theguardian.com/education/20...
www.theguardian.com/education/20...
Reposted by Tiago Peixoto
The first (1955) Danish edition of Ray Bradbury’s FAHRENHEIT 451. Later editions did not convert the title, so this is the only SI-compatible edition! 🎢
November 1, 2025 at 7:55 PM
The first (1955) Danish edition of Ray Bradbury’s FAHRENHEIT 451. Later editions did not convert the title, so this is the only SI-compatible edition! 🎢
FFS, why did the ML literature decide to abolish *plots* in favor of tables?
What if we did a single run and declared victory
October 23, 2025 at 9:49 AM
FFS, why did the ML literature decide to abolish *plots* in favor of tables?
Today I learned that there are bacteria and fungi in clouds, and I'm having a hard time processing this.
www.bbc.com/future/artic...
www.bbc.com/future/artic...
Weather makers: How microbes living in the clouds affect our lives
Trillions of bacteria, fungi, viruses and single-celled organisms travel the globe high in the atmosphere. Scientists are finding that they play a role in the weather and our health.
www.bbc.com
October 21, 2025 at 6:10 PM
Today I learned that there are bacteria and fungi in clouds, and I'm having a hard time processing this.
www.bbc.com/future/artic...
www.bbc.com/future/artic...
Reposted by Tiago Peixoto
I'd love to see someone try to estimate just how much time and money has gone into research that is either fully undermined by reliance on LLMs or fully pointless --- because obvious if you start from an understanding of what LLMs actually are.
www.pnas.org/doi/10.1073/...
www.pnas.org/doi/10.1073/...
October 18, 2025 at 10:11 AM
I'd love to see someone try to estimate just how much time and money has gone into research that is either fully undermined by reliance on LLMs or fully pointless --- because obvious if you start from an understanding of what LLMs actually are.
www.pnas.org/doi/10.1073/...
www.pnas.org/doi/10.1073/...
Reposted by Tiago Peixoto
‘It’s like a nuclear bomb has hit’: shocked Palestinians return home to desolation
‘It’s like a nuclear bomb has hit’: shocked Palestinians return home to desolation
Families are going back to Gaza City and surrounds to find their neighbourhoods obliterated, with many forced to camp in the ruins
When the Gaza ceasefire took effect a week ago, tens of thousands of Palestinians began to move from the sprawling camps in the south back to their homes in Gaza City and the surrounding area.
For most, it was a shocking and bitter homecoming. Continue reading...
www.theguardian.com
October 18, 2025 at 8:09 AM
‘It’s like a nuclear bomb has hit’: shocked Palestinians return home to desolation
Reposted by Tiago Peixoto
🚀 The University of Rochester is hiring in Complex Systems (Physics)!
Join a vibrant cross-disciplinary cluster supported by the Simons Foundation.
Great opportunity to build a program at the interface of physics, biology & cognition.
Apply ➡️ apply.interfolio.com/173432
Join a vibrant cross-disciplinary cluster supported by the Simons Foundation.
Great opportunity to build a program at the interface of physics, biology & cognition.
Apply ➡️ apply.interfolio.com/173432
Apply - Interfolio
{{$ctrl.$state.data.pageTitle}} - Apply - Interfolio
apply.interfolio.com
October 12, 2025 at 3:29 PM
🚀 The University of Rochester is hiring in Complex Systems (Physics)!
Join a vibrant cross-disciplinary cluster supported by the Simons Foundation.
Great opportunity to build a program at the interface of physics, biology & cognition.
Apply ➡️ apply.interfolio.com/173432
Join a vibrant cross-disciplinary cluster supported by the Simons Foundation.
Great opportunity to build a program at the interface of physics, biology & cognition.
Apply ➡️ apply.interfolio.com/173432
I've been porting some code from C++17 to C++23. Many nice improvements in the language!
A side note: Clang is so much worse than GCC in almost everything, from compilation times, runtime performance, to C++23 coverage... GCC alone is a good reason to dump MacOS for GNU/Linux (among many others).
A side note: Clang is so much worse than GCC in almost everything, from compilation times, runtime performance, to C++23 coverage... GCC alone is a good reason to dump MacOS for GNU/Linux (among many others).
October 7, 2025 at 11:25 AM
I've been porting some code from C++17 to C++23. Many nice improvements in the language!
A side note: Clang is so much worse than GCC in almost everything, from compilation times, runtime performance, to C++23 coverage... GCC alone is a good reason to dump MacOS for GNU/Linux (among many others).
A side note: Clang is so much worse than GCC in almost everything, from compilation times, runtime performance, to C++23 coverage... GCC alone is a good reason to dump MacOS for GNU/Linux (among many others).
Reposted by Tiago Peixoto
When you drag a woman by the hair, beat her and force her to kiss your flag, that’s how you tell the world you are the Good Guys
October 4, 2025 at 3:27 PM
When you drag a woman by the hair, beat her and force her to kiss your flag, that’s how you tell the world you are the Good Guys
Reposted by Tiago Peixoto
Want to promote transparency and clarity in network research by helping develop 𝐆𝐮𝐢𝐝𝐞𝐥𝐢𝐧𝐞𝐬 𝐟𝐨𝐫 𝐑𝐞𝐩𝐨𝐫𝐭𝐢𝐧𝐠 𝐀𝐛𝐨𝐮𝐭 𝐍𝐞𝐭𝐰𝐨𝐫𝐤 𝐃𝐚𝐭𝐚 (𝐆𝐑𝐀𝐍𝐃)?
Sign up to get involved here: tinyurl.com/help-with-GR...
▪️ All career stages welcome
▪️ All fields welcome
▪️ Be compensated for your time
Sign up to get involved here: tinyurl.com/help-with-GR...
▪️ All career stages welcome
▪️ All fields welcome
▪️ Be compensated for your time
GRAND Recruitment
Complete this short questionnaire to help develop Guidelines for Reporting About Network Data (GRAND).
tinyurl.com
October 1, 2025 at 12:21 PM
Want to promote transparency and clarity in network research by helping develop 𝐆𝐮𝐢𝐝𝐞𝐥𝐢𝐧𝐞𝐬 𝐟𝐨𝐫 𝐑𝐞𝐩𝐨𝐫𝐭𝐢𝐧𝐠 𝐀𝐛𝐨𝐮𝐭 𝐍𝐞𝐭𝐰𝐨𝐫𝐤 𝐃𝐚𝐭𝐚 (𝐆𝐑𝐀𝐍𝐃)?
Sign up to get involved here: tinyurl.com/help-with-GR...
▪️ All career stages welcome
▪️ All fields welcome
▪️ Be compensated for your time
Sign up to get involved here: tinyurl.com/help-with-GR...
▪️ All career stages welcome
▪️ All fields welcome
▪️ Be compensated for your time
Reposted by Tiago Peixoto
Pet peeve of the day: Ordinary graphs *do not* encode only "pairwise" interactions!
For example, a majority function of several inputs is encoded by a graph, but the interaction cannot be decomposed into independent pairwise ones.
Please stop spreading this silly meme!
For example, a majority function of several inputs is encoded by a graph, but the interaction cannot be decomposed into independent pairwise ones.
Please stop spreading this silly meme!
September 23, 2025 at 12:09 PM
Pet peeve of the day: Ordinary graphs *do not* encode only "pairwise" interactions!
For example, a majority function of several inputs is encoded by a graph, but the interaction cannot be decomposed into independent pairwise ones.
Please stop spreading this silly meme!
For example, a majority function of several inputs is encoded by a graph, but the interaction cannot be decomposed into independent pairwise ones.
Please stop spreading this silly meme!
“Call me old-fashioned, but I like my tiramisu scooped from a bowl and hitting my plate with a wobbly splat.”
There's something wrong with the British.
There's something wrong with the British.
Campanelle, London EC3: ‘A great illustration of the pros of working from home’ - restaurant review | Grace Dent on restaurants
Campanelle, London EC3: ‘A great illustration of the pros of working from home’ - restaurant review | Grace Dent on restaurants
A corporate-facing and not-very-Italian-at-all restaurant
www.theguardian.com
September 21, 2025 at 5:58 AM
“Call me old-fashioned, but I like my tiramisu scooped from a bowl and hitting my plate with a wobbly splat.”
There's something wrong with the British.
There's something wrong with the British.
Reposted by Tiago Peixoto
Hell on earth.
Over 50 Gazans Reportedly Killed by IDF, Including Family of Al-Shifa Hospital Director
www.haaretz.com/israel-news/...
www.haaretz.com/israel-news/...
Over 50 Gazans reportedly killed by IDF, including family of Al-Shifa Hospital director
***
www.haaretz.com
September 20, 2025 at 2:04 PM
Hell on earth.