Well, the study took on about 20 people with treatment resistant depression and immediately helped about 80% of them, harming no one, so yes, they know what the

Well, the study took on about 20 people with treatment resistant depression and immediately helped about 80% of them, harming no one, so yes, they know what they are doing. The issue with nature is that you can't control the environment, which is critical in a pilot study when you are trying to legitimize a long forbidden research subject.