Division and Classification Essay
There are three basic types of gardeners who may be classified by "a simple rule of thumb." There are the Green Thumbs, the Yellow Thumbs and the Brown Thumbs, each possessing its own unique characteristics. Though a person may belong to one particular thumb class for his entire life, there have been reports of gardeners in our society who have undergone thumb transplants and upgraded their particular status.
Dykstra, Thane, "A Rule of Thumb (1984)" (1984). The Valpo Core Reader. 548.