I can't argue with that. There really is a lot we still don't know. I have textbooks from only 8 years ago with information that has been proven false already.
I will say one thing though: they can tell if it is active in an athletes system or a metabolite from previous use. I still don't think previous use should be punished, but I can't say I have any evidence that disproves benefits while training. The question going forward would be are these benefits significant enough to have marijuana use at any time barred from the sport. After all there are many legal PED that can be bought OFC.
mad props: Toxic