While Robert Kenner's "Merchants of Doubt" is set to be released this Friday, the missed opportunity is to make a documentary about the merchants of small, local, organic food who manufacture bogus complaints about the modern agrifood system. Takes One to Know One Robert Kenner's documentary "Merchants of Doubt," derived from a book of the same name, will be released this Friday and seeks to expose how opponents to action against climate change try to instill doubt about the science undergirding the phenomenon. The charge is that opponents of taking action (aka climate deniers) use pseudo-arguments to mislead the public and infuse doubt.The irony is that a half-dozen years ago, Kenner used his own misinformation to sow doubts about the fo...