The satirical research field "parachute use to prevent death and major trauma" is such a goldmine. The two major publications
https://pmc.ncbi.nlm.nih.gov/articles/PMC300808/
and
https://www.bmj.com/content/363/bmj.k5094
are pretty much perfect satire of the way pseudo-skeptics dismiss domain experts and demand "hard evidence" in the form of exclusively flawless double-blind controlled studies, while clearly demonstrating that they have no idea what that entails, or what the limitations of RCTs are.
wild way to say "kill yourselves"
But the randomized control trial that was actually performed (second link) found no evidence that parachutes prevent mortality! (because they could only recruit people willing to jump off small, landed aircraft)
Okay wait how did you leave out:
It is a truth universally acknowledged that a medical intervention justified by observational data must be in want of verification through a randomised controlled trial.
Salt levels critical.
The relevance to parachute use is that individuals jumping from aircraft without the help of a parachute are likely to have a high prevalence of pre-existing psychiatric morbidity. Individuals who use parachutes are likely to have less psychiatric morbidity and may also differ in key demographic factors, such as income and cigarette use. It follows, therefore, that the apparent protective effect of parachutes may be merely an example of the “healthy cohort” effect.

























