Observation
Expertise cannot be downloaded, only inhabited.
An air traffic controller reads radar and window light together, catching what instruments alone would miss. A neurotoxicologist studies how proteins misfold in brains, work that began with watching her grandmother disappear. A Neanderthal carved wood tools forty thousand years ago, their hands knowing angles no blueprint could teach. The pattern is everywhere now: we are building systems that assume knowledge transfers through information, while the actual work demands presence, embodiment, and the irreplaceable time it takes to train perception itself.