An essay of only five short paragraphs published several years ago by the noted Harvard paleontologist Stephen Jay Gould about a controversial call by baseball umpire Babe Pinelli provides all the foundation necessary for a thorough investigation of the phenomenon of legal reasoning. The present article contrasts Gould’s analysis of a “strike” with the comment by then-Judge John Roberts at his Supreme Court confirmation hearings that he just wanted to “call [the] balls and strikes,” and through this exchange develops a new approach toward identifying—and teaching—the basic elements of sophisticated legal thinking. This article divides legal reasoning into four interrelated elements that anchor and structure the complex process that lays “be...