Dr Bachhuber: Going into the study, we hypothesized that patients with chronic pain might replace opioids with medical marijuana or supplement opioid medications with medical marijuana, allowing them to reduce their opioid dose. Alternatively, there is still a debate about whether medical marijuana might lead patients to use other drugs, so rates of opioid overdose might have increased...===
There is a possibility this "scholar" may not know anything, or, alternatively, he is absolutely certain he knows nothing, possibly because of heavy cannabinoid use.