Abstract

ABSTRACT One of the most important developments in twentieth-century rhetorical theory is Perelman and Olbrechts-Tyteca's insight that concepts, when under strain, can be split or dissociated into two separate terms. Not a simple binary, these terms remain interconnected in a value hierarchy with one term serving as the normative frame for the other. Perelman and Olbrechts-Tyteca theorize that either term can be dissociated further, producing a fan-type dissociation. Unlike ordinary dissociations, fan-types place three or more terms in hierarchical relationship, resulting in unique rhetorical features. Fanning a dissociation can serve three basic rhetorical functions: purging undesirable elements, preserving less undesirable elements from total devaluation, and purifying desirable elements. Building on these basic functions, rhetors can perform complex rhetorical actions, from intensifying a dissociation's values to completely undoing a dissociation. Long ignored by theorists and critics, fan-types complicate our understanding of dissociation, argumentation, and value-based reasoning, and therefore deserve more scholarly attention.