title: The origin and significance of class discrimination in immunity.
abstract: In this purely speculative article, Rod Langman develops the theme that a decision-making process requires information which distinguishes the choices and an interpretive mechanism which links a choice with an appropriate consequence.
authors.affiliation: Developmental Biology Laboratory, Salk Institute for Biological Studies, La Jolla, CA 92138-9216, USA.
authors.forename: R E
authors.initials: RE
authors.lastname: Langman