“Anna,” I say, my heart racing, “does mariposa lily have another name?” If it does, that might account for the problem in the data. We’ve been counting this flower as two separate data points, but it was, in fact, a single variable. “Yes,” Anna says, after a pause. “Some people call it the sego lily.” I pick up the datapod and search for the name. There it is. The properties are all the same. One flower, reported under two different names. Now, with its names combined, it rises right to the top of potential ingredients. It was a critical, elemental mistake made by those gathering the data, but
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