"Something I'm surprised no one has mentioned: Maybe the reason for the increase of mental illnesses isn't pot, but people who have mental illnesses are more likely to smoke pot. In other words, people who are already depressed are more likely to smoke pot because it makes you feel happy! Just because two things happen one after the other, it doesn't mean that one is causing the other. I remember an LSAT practice test question that said something to the effect that pot is a gateway drug because 98.8% of heroin users had smoked pot before doing heroin. By that logic, 100% of heroin users drank water before using heroin, so therefore water is the ultimate gateway drug."
- Alexis