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The article unpacks the long history of “world models,” from Schmidhuber’s 1990 proposal through Sutton’s Dyna and Ha & Schmidhuber’s 2018 implementation, to LeCun’s JEPA framework and the new LeWorldModel paper. It explains LeCun’s real contribution—predicting in latent space with SIGReg to prevent collapse—while calling out overhyped funding claims and noting limitations and prior art.