Sports Illustrated rights holder Minute Media lays off 12% of staff and reverses its ~$200M deal to buy VideoVerse, an AI platform to extract sports highlights (Meir Orbach/CTech)
https://www.calcalistech.com/ctechnews/article/kk215pdq7
A Modal de Finetti Theorem: Exchangeability under S4 and S5
Daniel Zantedeschi
https://arxiv.org/abs/2603.27547 https://arxiv.org/pdf/2603.27547 https://arxiv.org/html/2603.27547
arXiv:2603.27547v1 Announce Type: new
Abstract: We introduce modal exchangeability, a symmetry principle for probability measures on Kripke frames: invariance under those automorphisms of the frame that preserve the accessibility relation and fix a designated world. This principle characterizes when an agent's uncertainty over possible-world valuations respects the modal structure. We establish representation theorems that determine the probabilistic consequences of modal exchangeability for S4 and S5 frames. Under S5, where accessibility is an equivalence relation, the classical de Finetti theorem is recovered: valuations are conditionally i.i.d. given a single directing measure. Under S4, where accessibility is a preorder, the accessible cluster decomposes into orbits of the stabilizer group, and valuations within each orbit are conditionally i.i.d. with an orbit-specific directing measure. A rigidity constraint emerges: each directing measure must be constant across its orbit. Rigidity is not assumed but forced by symmetry; it is a theorem, not a modeling choice. The proofs are constructive, requiring only dependent choice (ZF DC), and yield computable representations for recursively presented frames. Rigidity has direct epistemic content: rational agents whose uncertainty respects modal structure cannot assign different latent parameters to worlds within the same orbit. The framework connects probabilistic representation theory to the S4/S5 distinction central to epistemic and temporal logic, with consequences for hyperintensional belief and rational learning under partial information.
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Sports Illustrated rights holder Minute Media lays off 12% of staff and reverses its ~$200M deal to buy VideoVerse, an AI platform to extract sports highlights (Meir Orbach/CTech)
https://www.calcalistech.com/ctechnews/article/kk215pdq7
"The bubble has burst, decent people can see what they are, and those who were once unsure are now sure and are turning their backs on Reform UK LTD. All they have is their die-hard fan base of racists, fascists and bots and bots can’t vote."
It’s All Starting to Unravel for Reform UK LTD - Dorset Eye
https://
Anthropic launches Opus 4.8, saying it's "more likely to flag uncertainties about its work and less likely to make unsupported claims", at the same price as 4.7 (Russell Brandom/TechCrunch)
https://techcrunch.com/2026/05/28/anthropi…
Should IPCC apologise for adjusting its worst case global warming scenario? "Complete nonsense," says Prof. Detlef van Vuuren.
Emissions did not grow as fast as in RCP8.5, and the uncertainty range of projections for 2100 narrowed as we get closer.
Most likely now is 2.5 to 3°C, which would be a very bad outcome already.
Meta's Oversight Board says Meta agreed to increase its funding by $13M, ensuring that it will be funded through 2028, reversing a planned decrease in funding (Casey Newton/Platformer)
https://www.platformer.news/meta-oversight-board-funding-2028/
«AI has little reason not to exude confidence. If AI gives you wrong advice, nothing happens to it. There’s no social cost, no loss of standing, no hesitation the next time it speaks.»
https://www.theatlantic.com/ideas/2026/03/ai-confidence-tr…
Meta's Oversight Board says Meta agreed to increase its funding by $13M, ensuring that it will be funded through 2028, reversing a planned decrease in funding (Casey Newton/Platformer)
https://www.platformer.news/meta-oversight-board-funding-2028/
Fresha, a London-based beauty and wellness booking marketplace, raised $80M from KKR's growth equity arm at a $1B valuation, bringing its total raised to $285M (Dominic-Madori Davis/TechCrunch)
https://techcrunch.com/2026/05/21/booki…