I have been smoking weed now,for about 5 months.I've smoked 3 times a day and it hasn't affected my mental abilities a tad bit.One thing I do notice how ever,whenever I smoke low quality ganja,a sense of foggyness comes over me for a day.Stop blaming the marijuana.Make sure you get GOOD QUALITY BUD.I started smoking because of my Crohns disease and I can honestly say its one of the most outstanding medications,not only for the body but for the mind too!:jointsmile: