  This section mentions briefly some other applications of Sylvan’s preferred logics to a wide range of philosophical problems. Sylvan saw applications as a test for the choice of such theories over rival logics. Sections 3 and 4 are in a way extended discussions of such applications. Sylvan argued that relevant and, more broadly, what he termed “sociative logics” had applications in areas as diverse as causation, an analysis of knowledge, vagueness (including the idea that there are vague objects; see Sylvan and Hyde 1993), and value theory. Here we sketch two such applications, in confirmation, and computation.