In a recent discussion of human in vitro fertilisation, Kuhse and Singer argue that it is legitimate to destroy unwanted embryos. Their argument fails: it involves at least two and possibly three logical fallacies. If the destruction of embryos is to be justified an alternative argument will have to be found.

B F Scarlett; Formal and Teleological Elements in Hirst’s Argument for a Liberal Curriculum, Journal of Philosophy of Education, Volume 18, Issue 2, 30 May 2006.