Well to me weed made me a smarter person but I'm aware of people who've gotten stupid because of it. I had this theory that the long-term effects that weed has on your brain depend on what age you start smoking at. I only started when I was 16, so it didn't fuck me up, but I think that if people start smoking regularely at 12 or 13 (and I know people), then the effects could be different.