To function is a verb derived from experiences involving
machines. We expect from machines uniform performance within a
defined domain. In adopting the metaphor of functioning to refer
to language, we should be aware that it entails understandings
originating from human interaction involving sign systems, in
particular those eventually embodied in literacy. The argument
we want to pursue is straightforward: identify language
functions as they are defined through various pragmatic
contexts; compare processes through which these functions are
accomplished; and describe pragmatic circumstances in which a
certain functioning mechanism no longer supports practical
experiences at the efficiency level required by the scale of the
pragmatic framework.