On Monday, Politifact published the results of its research into the accuracy of MPP’s statement in a recent ad that marijuana is objectively safer than alcohol. As expected, the statements in the ad were true (despite Politifact giving a strange conclusion as to why it was only mostly true). What was unexpected, however, was the response from the National Institute on Drug Abuse: "Claiming that marijuana is less toxic than alcohol cannot be substantiated since each possess their own unique set of…