Opponents of marijuana legalization often rely on misleading arguments and fear tactics in their attempts to diminish support for sensible marijuana policy reform. In the run-up to the election for Proposal 1, the adult-use legalization initiative that recently passed in Michigan, the prohibitionist group Healthy and Productive Michigan went even further by publishing television ads with demonstrably false claims. In their first TV ad, opponents claimed that Prop 1 would allow marijuana products…