Abstract
This is a brief response to Stephen Buckle's paper 'Biological Processes and Moral Events', Journal of Medical Ethics 14 (1988): 144-7, in which Buckle argues that the continuity of early human development does not preclude there being 'morally significant' events, such as syngamy, that set boundaries for the permissibility of human embryo experimentation. I reply to Buckle that the very continuity at issue does indeed preclude the existence of such 'morally significant' events, and that the Australian Senate Select Committee on Human Embryo Experimentation (1985) was, contra Buckle, not confused about this matter. ERRATUM: middle column, line 3 from bottom: 'fifteen days later' should read 'one day later'.