Classification of Pillow Temperature Rotation as Normal Conduct
The cold side is located, used, and depleted in under ninety seconds, which creates demand for the cold side.
What Would Have Happened If the Pillow's Temperature Were Stable
Scenario: Pillow maintains a consistent surface temperature throughout the night. The flip is never necessary. The person who flips a pillow repeatedly in search of the temporarily colder side has no reason to flip.
Projected Outcome: Sleep begins at normal time. The pillow is used. The pillow is not re-evaluated.
What Actually Happened
The pillow is warm. It has been warm since the person's head has been on it, which is the expected thermodynamic situation. The flip reveals a cooler surface. This cooler surface is correct. The person's head resettles.
Approximately ninety seconds later, the cool side is warm.
The flip happens again.
The object is rarely important enough to address, which is exactly why the pillow temperature rotation survives.
The Rotation Problem
A pillow has two sides. Both sides reach ambient head temperature at the same rate. Flipping accesses one slightly cooler surface at the cost of warming the surface that was just used. There is no side that remains cool. The rotation is a retrieval system for a resource that is depleted by retrieval.
The housemate who flips a pillow repeatedly in search of the temporarily colder side knows this at some level. This knowledge does not reduce the value of the cool side or the impulse to locate it.
Infrastructure Status
The pillow temperature rotation gains a preferred location that nobody remembers choosing. This preferred location is: the top of the bed, arranged so that both sides are accessible without relocating the person. Adjacent objects are reorganized to accommodate this. The second pillow is kept nearby as a reserve.
Adjacent objects are reorganized to protect the arrangement from accidental correction.
Conclusion
A future cleanup creates a formal appeals process led by the person who originally said it was temporary. The pillow has been in this position for months. The process has not been initiated. The flip continues. The cool side is there and then it is not and then it is accessed again.
This is the system. It is operational.