Structure produces behavior.

One stock, two independent flows. The level only tracks inflow minus outflow — it has no idea how full it already is.

The inflow is a function of the stock: more balance → more interest → more balance. The loop feeds itself.

The gap between the coffee and the room drives the outflow. As the gap shrinks, the flow shrinks.

Same balancing loop as the coffee — but the sensor reads a delayed temperature, so the heater keeps acting on stale information.

A balancing loop chasing a goal — but the goal itself drifts down toward whatever performance you're already getting. Standards adjust to reality instead of reality rising to the standard.