Intervention points

For each rival mechanism you listed, name the specific spot you could actually reach in and change something, and say what would shift downstream if that mechanism is the real one. Handles you can grab, not structure you can only describe.

For each rival mechanism you listed, name the specific spot you could actually reach in and change something, and say what would shift downstream if that mechanism is the real one. Handles you can grab, not structure you can only describe.

Example

If the phone displaces sleep, the handle is where the phone sleeps: charge it in the kitchen at 9pm. If social stress drives both, the handle is the group chat or the lunch table, not the device. Two mechanisms, two different levers.