CONCEPT
Technical Rationality
Schon's name for the dominant epistemology of modern professional education — the model in which practice is the application of scientific theory to well-defined problems.
Technical rationality is the three-century-old framework that organizes Western professional knowledge into a downward hierarchy: basic science produces principles, applied science translates them into techniques, and practice applies those techniques to problems in the world. It governs the architecture of virtually every professional school — medicine, law, engineering, management — and underwrites the self-understanding of credentialed expertise. Schon's career was an extended demonstration that this model describes almost nothing about how competent practitioners actually work. The hierarchy holds on the high ground of well-defined problems but collapses in the swampy lowlands where professional judgment is most needed. Technical rationality is the lie every professional school tells, and AI's arrival has made its inadequacy economically consequential rather than merely epistemological.
In The You On AI Field Guide
The framework Schon attacks has an institutional elegance that accounts for its persistence. Universities teach the theory. Professional schools teach the technique. Practitioners apply both. The sequence feels natural — of course you learn the science before you practice the art. Medical students study