Although there is no clear-cut doctrine of the subject in the work of
Georges Canguilhem, nevertheless there is a sense in which the subject
functions as a kind of operator in his work. This article delineates
three aspects of such an operative function: a quasi-ontological disco
ntinuity separating the living from the non-living; a discontinuity se
parating technique from science; and an ethical discontinuity that on
be exemplified in the case of medicine. It is at these points of disco
ntinuity that the notion of the subject effectively comes into operati
on in Canguilhem's work.