Conjoined Twins and the Biological Account of Personal Identity
Koch-Hershenov (Rose J.)
Source: The Monist, Vol. 89, No. 3, Coming into Being and Passing Away (July 2006), pp. 351-370
Paper - Abstract

Paper SummaryBooks / Papers Citing this PaperNotes Citing this PaperText Colour-Conventions


Author’s Abstract

  1. During the first 16 days after fertilization, the developing embryo has the capacity to separate into two genetically identical embryos, or monozygotic twins (triplets, etc.). Because of this capacity, philosophers typically argue that the pre-16 day embryo is not a human being.
  2. On a Biological Account of Personal Identity (BAPI), which considers us human beings as essentially organisms, the development of the embryo into an organism at 16 (or 21) days marks our origins. The development of an embryo into an organism is also said to mark the point at which the embryo loses its potential to give rise to monozygotic twins. This is considered a strength of the Biological account of our origins.
  3. I will argue here that it is the BAPI's own criteria that will have to allow cases of monozygotic twinning occurring even after 16 days, and that in virtue of this a Biological Account faces twinning puzzles usually reserved for earlier accounts of our origins.

Comment:

Hard copy in "Various - Papers on Identity Boxes: Vol 08 (I-K)".

Text Colour Conventions (see disclaimer)

  1. Blue: Text by me; © Theo Todman, 2017
  2. Mauve: Text by correspondent(s) or other author(s); © the author(s)



© Theo Todman, June 2007 - November 2017. Please address any comments on this page to theo@theotodman.com. File output:
Website Maintenance Dashboard
Return to Top of this Page Return to Theo Todman's Philosophy Page Return to Theo Todman's Home Page