It looks like I get to be the one to comment a classic criticism of RCT absolutism.
There have been no RCTs on parachutes or bulletproof vests. Volunteers welcome.
There have been no RCTs on parachutes or bulletproof vests. Volunteers welcome.
The study has... let's just say "other methodological problems". But they did do an RCT of parachute use! (The open peer review correspondence is quite fun, too).