all i know is that since school has started which was about 2 month's ago ive been smoking everyday and ive gotten the best grades ive ever got(5 A's) i dont know if its cuz of the weed but 1 thing i have learned is that weed dosent make u dumb....by the way ive been smoking everyday all together 4 about 8 months and the ONLY negative effect is short term memory loss