Later in the same article, the same doctor said that it's impossible to show whether the psilocybin was responsible because they might have come through the dep

Later in the same article, the same doctor said that it's impossible to show whether the psilocybin was responsible because they might have come through the depression anyway. I get the impression that this doctor is strongly anti-drugs, and is allowing his personal bias to cloud his professional judgment. The fact that he makes a living from the psychiatric treatment of cancer patients might go some way to explaining his bias, but also makes it all the less excusable.