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Walter Quattrociocchi

@walter4c.bsky.social
481 followers 34 following 37 posts

Full Professor of Computer Science @Sapienza University of Rome. Data Science, Complex Systems

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Walter Quattrociocchi @walter4c.bsky.social · 26/11/2025
LLMs don’t form judgments. They skip straight to the answer. No evaluation. No grounding. Just fluent output. When generation bypasses judgment, knowledge becomes a performance. Welcome to Epistemia. PNAS commentary ⬇️ www.pnas.org/doi/10.1073/...
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Sander van der Linden @profsanderlinden.bsky.social · 21/11/2025
New study on LLMs shows that while LLMs & humans converge on similar judgments of reliability of news media, they rely on very different underlying processes. In delegating, are we confusing linguistic plausibility with epistemic reliability? The age of "epistemia" www.pnas.org/doi/epdf/10....
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Dan Vergano @danvergano.bsky.social · 20/11/2025
How LLMs generate judgments www.nature.com/articles/s43... "driven by lexical and statistical associations rather than deliberative reasoning"
nature.com
How LLMs generate judgments - Nature Computational Science
Nature Computational Science - How LLMs generate judgments
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Reposted by Walter Quattrociocchi
Nature Computational Science @natcomputsci.nature.com · 20/11/2025
📢Research Highlights out today! We highlight work by @walter4c.bsky.social, @matteocinelli.bsky.social, and colleagues on how LLMs generate judgments about reliability and political bias, and how their procedures compare to human evaluation. www.nature.com/articles/s43... #cssky
nature.com
How LLMs generate judgments - Nature Computational Science
Nature Computational Science - How LLMs generate judgments
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Walter Quattrociocchi @walter4c.bsky.social · 18/11/2025
Data changed the info business model: confirmation → echo chambers → infodemics LLMs drop cost of “knowledge-like” content to zero. Result: Epistemia — when language sounds like knowledge. Outsourcing shifts decisions from evidence → plausibility PNAS:https://www.pnas.org/doi/10.1073/pnas.1517441113
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Walter Quattrociocchi @walter4c.bsky.social · 29/10/2025
#Grokipedia just launched. An AI-built encyclopedia, pitched as a “neutral” alternative to Wikipedia. But neutrality is not the point. What happens underneath is. 👇
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Walter Quattrociocchi @walter4c.bsky.social · 29/10/2025
timely, considering Grokpedia and all the related implications.
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Walter Quattrociocchi @walter4c.bsky.social · 20/10/2025
“LLMs don’t understand.” Of course. That was never the point. The point is: we’re already using them as if they do — to moderate, to classify, to prioritize, to decide. That’s not a model problem. It’s a systemic one. The shift from verification to plausibility is real. Welcome to Epistemia.
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Reposted by Walter Quattrociocchi
Proceedings of the National Academy of Sciences @pnas.org · 16/10/2025
LLMs can mirror expert judgment but often rely on word patterns rather than reasoning. A new study introduces epistemia, the illusion of knowledge that occurs when surface plausibility replaces verification. In PNAS: ow.ly/ry7S50Xcv9b
Prompt used for all LLMs when provided with the scraped HTML homepage.
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Walter Quattrociocchi @walter4c.bsky.social · 14/10/2025
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CEU Department of Network & Data Science @ceu-dnds.bsky.social · 12/03/2025
📢Join us for a public lecture by @walter4c.bsky.social about the impacts of social media on society. ⛓️‍💥For online attendants, please register here: bit.ly/3FomgkF
Impact of Social Media on Society by Walter Quattrociocchi at the Department of Network and Data Science at the Central European University
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Walter Quattrociocchi @walter4c.bsky.social · 03/01/2025
1/ 🎉 First paper of 2025! In the quantitative study of the attention economy, we asked a key question: How much does a like—or a viral post—truly reverberate? Our new study, published in Scientific Reports, dives into this crucial topic. 🧵
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Computational Social Science @com-soc-sci.bsky.social · 19/12/2024
A follow-up to this Nature paper (www.nature.com/articles/s41...) has just been published in PNAS: www.pnas.org/doi/10.1073/...
pnas.org
Patterns of linguistic simplification on social media platforms over time | PNAS
Understanding the impact of digital platforms on user behavior presents foundational challenges, including issues related to polarization, misinfor...
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Walter Quattrociocchi @walter4c.bsky.social · 06/12/2024
Breaking News! Our latest paper has just been published in PNAS! 📄 We analyzed 34 years of data a cross 8 social media platforms to uncover how language has evolved in the digital age. 👉 Read the paper here www.pnas.org/doi/10.1073/...
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Walter Quattrociocchi @walter4c.bsky.social · 27/11/2024
1/ 🚨 New preprint on arXiv 🚨 "Characterizing the Fragmentation of the Social Media Ecosystem" arxiv.org/abs/2411.16826 @matteo_cinelli , @m_starnini edoardo di martino Alessandro Galeazzi #echoplatforms #fragmentation
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Walter Quattrociocchi @walter4c.bsky.social · 02/04/2024
Hello World!
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