References to the concept of symmetry have appeared in judicial opinions, advocacy efforts, and scholarly commentary throughout American legal history. But for every legal writer who invokes the concept as a logical or moral ideal, there is another who dismisses it as a formalistic distraction or an arid illusion. What is more, although legal writers virtually always use the term “symmetry” as if its meaning were self-evident, in fact they have used the same term to refer to a variety of distinct concepts, each with its own ambiguities.
Petroski, Karen. The Rhetoric of Symmetry. Valparaiso University Law Review, vol. 41, no. 3, pp.1165-1234, Spring 2007.