im 16 and i started when i was 12 and my memory gets me through the day so i in no way regret my choice, since without weed i may not be here today, it got me through some pretty hard times, but i have a friend who started smoking weed when he was 7 and he has quite the vocabulary and all his marks are in the 80s and 90s in school so i dont think weed fucks everyones memory up