The supernatural strangely evaporates when put to rigorous testing......
The supernatural is by definition not subject to the scientific method. You cannot use the empirical method to draw any conclusions about the supernatural. That is why it's called the supernatural.
It is subject to the legal standards of evidence such as testimony, though. It does not evaporate in this case.
Physical effects are detectable, therefore testable. Physical effects may be traced to their cause. At which point supernatural explanations tend to evaporate.
