As proven by DU seven days a week.
I've felt for a long time that heavy use of dope lowers IQ. And I've pointed to the higher use and lower IQs of liberals as proof. I first began wondering about the ill effects of marijuana during the seventies. That's when I started noticing the decrease in quality of the music by many of the great musicians of the sixties...especially The Beatles and Bob Dylan. When the sixties ended, all of a sudden their music turned to crap. With Dylan actually before the decade ended. Like many sixties musicians, they'd been or still were heavy dopers. Brian Wilson is an example of one sixties icon who almost totally lost his mental functions due to heavy drug use. And furthermore, many of the biggest libs I know from family, work, or friends were heavy dopers. It's incontrovertible: heavy dope use leads to liberalism and loss of creativity.