FoucaultM., “Introduction” to Canguilhem, the normal and the pathological, trans, by FawcettC. R. (Dordrecht, Holland/Boston/London, 1978), p.xv. A version of this preface translated as “Georges Canguilhem, philosopher of error” appears in I & C, no. 7: Technologies of the human sciences (Autumn, 1980), 51–62.