CONCEPT
The Useful Knowledge Feedback Loop
The self-reinforcing cycle — central to Mokyr's theory of growth — in which propositional knowledge generates prescriptive techniques, which generate new data and problems, which generate new propositional understanding.
The useful knowledge feedback loop is Mokyr's engine of sustained economic growth. The mechanism operates in four stages. Propositional knowledge — understanding why things work — generates prescriptive knowledge — techniques for making them work. The application of prescriptive knowledge produces new experiments, new data, and new problems that existing propositional knowledge cannot explain. The encounter with unexplained phenomena generates new propositional knowledge. Expanded propositional knowledge creates new prescriptive possibilities. The loop reinforces itself, and its speed is governed by whichever stage is the slowest. For most of human history, the bottleneck was the conversion of propositional into prescriptive knowledge — the expensive, slow, skill-dependent process of turning understanding into technique.
In The You On AI Field Guide
The framework explains why scientific knowledge alone does not produce economic growth. A society can possess extensive propositional knowledge — the late Roman Empire, Song Dynasty China, medieval Islamic civilization — without sustaining the feedback loop. The loop requires channels