Marco Fioretti (@mfioretti.bsky.social)

just found a GREAT confirmation: "#Socialmedia... no longer merely contain echo chambers. They become them." www.linkedin.com/pos... of what I thought about #AI vs voting: "#democracy may end.. bc [social media & AI] make much harder to CHANGE any idea one already had" mfioretti.substack.c...

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Grokipedia has just been released. A large language model generates entries, and the result is presented as a more "neutral" alternative to Wikipedia. But neutrality is not the central issue. What… | Walter Quattrociocchi | 16 comments Grokipedia has just been released. A large language model generates entries, and the result is presented as a more "neutral" alternative to Wikipedia. But neutrality is not the central issue. What matters is the structure that enables, shapes and legitimizes what we call knowledge. Two intertwined transformations are taking place. The first is infrastructural. Social media environments are evolving into ideologically coherent systems. They no longer merely contain echo chambers. They become them. These are what we define as echo platforms: ecosystems that reinforce belief rather than promote exposure, and that select not only content but worldviews. The second is epistemic. Language models are increasingly embedded into evaluative processes: moderation, ranking, recommendation, classification. They produce outputs that appear aligned with human judgment, but the underlying process is statistical, not normative. Coherence replaces verification. Fluency mimics understanding. This is the condition we term epistemia: the illusion of knowledge that emerges when plausibility substitutes reasoning. We explored both dimensions in two recent papers: "The Simulation of Judgment in LLMs" (PNAS, 2025) https://lnkd.in/d8YVan-C "Ideological Fragmentation of the Social Media Ecosystem" (PNAS Nexus, 2025) https://lnkd.in/dFd__uga What is at stake is not just the quality of information, but the very criteria by which it is produced, assessed and believed. This is not a technological shift. It is a cognitive one. | 16 comments on LinkedIn https://www.linkedin.com/posts/walterquattrociocchi_grokipedia-has-just-been-released-a-large-activity-7389213052736438272-HgWH/