We have amassed a huge body of knowledge about the brain. But because that knowledge is purely descriptive, not explanatory, we actually understand very little about how the brain works.
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This was the central idea of Allen Newell's 1973 essay. We keep accumulating new neuropsychological observations -- by the 1000s. While these observations may seem locally interesting, they don't add up to a whole. We're missing a holistic theory. 47 years later, it remains true
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You can't play 20 questions with nature and win.
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What is your assessment of his later work on Unified Theories of Cognition? It seems that SOAR and ACT-R today give fairly accurate timing predictions for lots of experimental data. (Not really my area, but I'm wishing it success!)
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I see SOAR and ACT-R as historical curiosities. Certainly interesting in themselves, and valuable efforts in their time, but not what I'm looking for (and, I suspect, not what he was really looking for either)
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Yes, this one
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