... may include such features as creating a pseudo-variable for “North,” one for “South,” another for “East,” one for “West,” and perhaps others for other features of interest, such as population density ... of pseudo-variable inputs for each alpha label—that is, for this example, a unique pattern for each item in the produce department. The domain expert must make sure, for example, either that the ... Why? Because for much of this curve, there is no single value of y for every value of x. Take the point x = 0.7, for example. There are three values of y: y = 0.2, y = 0.7, and y = 1.0. For a single...