Depending on which doctor you speak with, or which websites you read, cannabis could be an appealing, low-risk medicine - even an aid to wellness - or an insidiously addictive drug rotting the brains of our youth. This dissonance confuses young people, distressed patients, and paralyzes politicians, all while inviting dubious sources of information and resulting in uninformed choices, enhanced polarization, and a fragmented national policy. Seeing...