One of the many things that amazed me in my second stint at the NYTimes was how often tacos and tortillas were confused, by people who were paid to inform themselves by eating. So I guess I shouldn’t be astonished that a compromised locavore study has been flying around the series of tubes with no brakes on one weirdness. It professes to trace the global impact of a taco, but it scornfully reports that “the rice comes from Thailand.” Rice? In a taco? From Twitter, I know such a thing has been sighted. But it’s just bizarre. Having grown up in a Mexican neighborhood in Arizona, I think it’s sick enough that people enfold rice into a flour tortilla to make a burrito. And I wonder how seriously anyone would take a similar study that tracked back the rice in a hot dog. Or pastrami sandwich.