If it's not debatable because of a overwhelming preponderance of peer-reviewed research clearly proves the assertion, then finding a citation (or a dozen) should be trivial.
Questioning it is like demanding proof that twinkies make you fat. Tell yuo what. See if you can find me a reputible scientist who refutes it.
Tell you what, when you find a reputable scientist that claims it, I'll start searching for a scientist to refute it. No need to refute rumor and myth.
Meanwhile I will parse the list I provided, but then you're on your own:
Nothing here looks scientific.
Staying in denial won't help your cause. Neither will summarily dismissing 560,000 hits all saying the same thing because you don't think any of them are "scientific." Find me a few thousand pro-drug studies that ravesabout the rock-hard boners pot bestows and then we'll talk.