Originally Posted by OldHat
Rainwater is distilled water.



I may be wrong

But evaporation, sublimation, condensation is not distillation


Distillation necessitates heating water to Kelvin: 373.2 K
Celsius: 100ºC
Fahrenheit: 212ºF

That doesn’t occur in the normal rain cycle.



You can get those temps in nature but it would volcanic or other extreme heat. But then, that’s just a boiling off. Capturing it and recondensing it would be distillation. Hence, a “still” with manipulation and control.