Within the middle of the cognition bell curve, yes. Pattern recognition, organizational skills, general personal awareness and motivation are all higher in the non-smokers I know compared to the daily smokers.

My guess, anecdotally, is that the people you know who are perpetually high on cannabis are not the only people you know who are perpetually high on cannabis.

So then actually you're just talking about the average, right? If that's the case, then I think it's a bit harder to justify that cannabis use is the cause of those symptoms and not an effect of them.

I mean excluding exceptional cases. Someone who has an IQ of 150 who starts smoking daily will still probably be more cognizant than a sober person with an IQ of 80.