CONCEPT
The Phronesis Barrier
The claim — central to this book's reading of the You On AI — that the collapse of techne's cost reveals a deeper barrier that was always the harder problem: deciding what deserves to be built.
The phronesis barrier is the Aristotelian reformulation of what the You On AI calls ascending friction. The claim is structural: when the cost of productive knowledge (techne) approaches zero, the scarcity relocates to the judgment (phronesis) about what the production should serve. The barrier was always there; the techne barrier merely concealed it. The AI transition makes the structural asymmetry visible by dissolving the cover. The harder question — what is worth building, for whom, to what end — cannot be dissolved by improving the tools, because the tools cannot answer it in principle.
In The You On AI Field Guide
The techne barrier in software engineering used to be substantial. Years of training separated the idea from the artifact. This barrier made the question of what to build appear secondary — or worse, it absorbed the conversation, so that debates about technical feasibility crowded out debates about technical desirability. The