Theory 01/Molecular & anomalous/Density anomaly
The Density Maximum Is a Lifetime Ratio
The claim
The temperature of water's density maximum is set by the ratio of hydrogen-bond lifetime to collision rate, so the anomaly shifts when that ratio is changed by pressure or solutes.
01Mechanism
Density depends on how much open tetrahedral order survives; the lifetime relative to collision determines the equilibrium fraction.
02Prediction
The maximum should shift with pressure as the lifetime changes.
03Refutation
A fixed maximum across pressures would remove the kinetic argument.