Marijuana: Opponent's Factual Brief Factual Proposition: Consuming marijuana is detrimental to one's health. Definition of key terms: 1. Consumption= Smoking or eating marijuana. 2. Marijuana= Psychoactive mind altering substance, also known as cannabis. 3. Detrimental= Serious harm. Primary Inference: Smoking or eating marijuana is likely to create serious health problems for most individual users or society. Overview: Since the 1920's supporters of marijuana prohibition have exaggerated the drugs dangers. Many of the “reefer madness” tales that were used to bri