because, apparently, participants know for sure what they took, LOL

Also, some of the studies advertise to people who might be fully primed to have a "spiritual experience". Are you open to trying a psychedelic for spiritual purposes? Come try our study!

Very hard to know how to be academically rigorous.

Also, last time I checked, the rave crowd doesn't all the sudden come around having excellent mental health. So, I think set/setting must be just as important as the substances themselves. And if that's the case, is it even the substances at all? Etc. You get it.