My question is how do some people "stone themselves stupid" (I think most of you know what I mean). The only smokers that I know are younger ones and perhaps it is only possible to "stone yourself stupid" is when your brain is still maturing (since I don't know of any older smokers). My theory is this: supposedly it is a scientific fact that some of the cannaboids in cannabis affect the part of the brain as the hypothalamus (the part of the brain that is VITAL in storing short term memory (this is also the part of the brain that was messed up with the girl in the movie "50 first dates" if you ever saw it)). This obviously explains why sometimes, when we get baked off our asses, we some times don't remember all of the experience. And since the average half-life of marijuana is 20 hours-10 days, and if a teenager gets high daily, they wouldn't be able to retain nearly the information if didn't smoke as much. Letâ??s say, a teenager starts smoking when he is 14, 3-4 times weekly. This coupled with the half life of marijuana could be devastating to adolescence teenagers (and one of the reasons why I only smoke on weekends). But then again I know people who smoke daily and stil haven't stoned themselves stupid.

So I guess my real question is
1. Can you "stone yourself stupid" after your brain has fully matured?
2. Also, does my theory make sense? Any refuting/contrary ideas would be greatly appreciated (I wouldn't mind being able to smoke daily!).
3. If my theory is false, how do some adolescence teens "stone themselves stupid?"