“The biological organism and the social persona are profoundly different social constructions. The different systems of social practices, including discourse practices, through which these two notions are constituted, have their meanings, and are made use of, are radically incommensurable. The biological notion of a human organism as an identifiable individual unit of analysis depends on the specific scientific practices we use to construct the identity, the boundedness, the integrity, and the continuity across interactions of this unit. The criteria we use to do so: DNA signatures, neural micro-anatomy, organism-environment boundaries, internal physiological interdependence of subsystems, external physical probes of identification at distinct moments of physical time -- all depend on social practices and discourses profoundly different from those in terms of which we define the social person.
The social-biographical person is also an individual insofar as we construct its identity, boundedness, integrity, and continuity. But the social practices and discourses we deploy in these constructions are quite different. We define the social person in terms of social interactions, social roles, socially and culturally meaningful behavior patterns. We construct from these notions of the personal identity of an individual the separateness and independence of that individual from the social environment with which it transacts, the internal unity or integrity of the individual as a consistent persona, and the continuity of that persona across social interactions.”

Source: Textual politics: Discourse and social dynamics, 1995, p. 68