Read the entire article - the only causality proved was in rats. As for humans: "Adolescent cannabis use is associated with behavioral changes related to reward and motivation in humans. [...] It is not known whether adolescent cannabis use causes either of these responses, or if cannabis use is rather a symptom of a pre-existing state that results in these behaviours."
Thank You Noble Free.
If you’ve been around a dope head you’ll know that there has been long term damage
Then you misread the article, no causality was proven in rats.
Causality is incredibly difficult to prove in medical science. Is associated with is not “proven causality”.
But correlation isn’t nothing, important to note to raise the right questions for further and deeper study.
Are you quoting from that 2002 article again?
The evidence is mounting that there is not a pre-existing condition, but that cannabis directly causes the brain morphology changes. The effect happens in developing brains, which, according to a psychologist I saw at a conference recently, continue development until about age 30.
I seriously wonder if you have some financial stake in legal and widespread marijuana use, you are so quick to dismiss the growing body of experimental evidence that shows pretty definitely that marijuana use is not benign.
And, as always, follow the money (grants, funding).
Is a certain conclusion drawn simply based upon a desire for more money?
/rhetorical question
"We've drawn some interesting conclusions but we really need to research
it more thoroughly. Could we get another $400,000 to study it some more?"
/Canadian neuroscientist impression