> If yes, it's troubling. All my stoner friends claim no permanent damage from chronic use
I mean, your stoner friends have got to be making a strange claim in the first place. There is no magic Twin Earth, where yoga is a contact sport, John McCain is president, and they never smoked, that they can compare themselves to.
We all decline somewhat from other factors, the question is just how much is attributable to what. How would they even be able to parse out their cannabis-decline from their age-decline, or from their haven't-practiced-long-division-recently decline, etc?
If they are only thinking "I felt dumber when smoking but now that I stopped, it seems gone", well, that's something, but it can't be a complete picture vs their never-smoked potential.
I mean, your stoner friends have got to be making a strange claim in the first place. There is no magic Twin Earth, where yoga is a contact sport, John McCain is president, and they never smoked, that they can compare themselves to.
We all decline somewhat from other factors, the question is just how much is attributable to what. How would they even be able to parse out their cannabis-decline from their age-decline, or from their haven't-practiced-long-division-recently decline, etc?
If they are only thinking "I felt dumber when smoking but now that I stopped, it seems gone", well, that's something, but it can't be a complete picture vs their never-smoked potential.