RT Journal Article SR Electronic T1 Nature and nurture. JF Journal of Medical Ethics JO J Med Ethics FD BMJ Publishing Group Ltd and Institute of Medical Ethics SP 96 OP 99 DO 10.1136/jme.8.2.96 VO 8 IS 2 A1 D Papineau YR 1982 UL http://jme.bmj.com/content/8/2/96.abstract AB