When I hear someone say "smoke dope" I don't think of pot, I think of crack/heroin.
Secondly, I have never heard that smoking weed can increase your memory. No freakin way. Smoked weed for years-years ago, don't now because I can't concentrate, it makes me lazy, hungry, tired (does any of this sound good to anyone?) mood swings, and absolutely no motivation-I see people who turn into fiends for this crap and it is pathetic. People like this will call up anybody and their brother asking" Hey man, do you got a joint? Know where I can get one?" that's addiction.
On the other hand, I have also heard that smoking pot is a lot stronger in your lungs than tobacco. There are probably website links that will give you specifics.
To all you potheads-I know it's fun for a little while and it feels good, but good luck when you try to become successful and have nice things in life, but can't remember anything you learned in school. Oh wait, you probably didn't make it all the way through high school if you are a big freakin pot head. (statistically speaking)