By Paul Armentano Much has made — by the mainstream media and others — of the claim that cannabis use causes certain types of mental illness , specifically schizophrenia and psychosis. Most notably perhaps, a team of researchers writing in the July 28, 2007 edition of the prestigious scientific journal The Lancet , boldly proclaimed that smoking cannabis could boost one’s risk of a psychotic episode by 40 percent or more. Naturally, this alarmist rhetoric received ... Read the Full Article