Chuck Schumer is trotting out old canards about how cannabis "doesn't hurt anybody else." Hearing him tout the virtues of legalization in Colorado and Washington ("lots of good and no harm!"), one is reminded of Purdue Pharma, the pharmaceutical company that spent years (and millions) telling doctors that opioids weren't seriously addictive when prescribed to pain patients. It's stunning that educated people ever believed this, but many did. Today, many are equally anxious to believe that legal pot probably has little to do with Colorado's sharp increase in auto accidents. And there are homeless people everywhere, right? Correlation doesn't equal causation.