I do not believe that a particular position on abortion, for or against, should be part of the Extropian political principles. When does a cell mass stop being an embryo and start being a sentient being? This is a question of neurology and nothing else.
--
sentience@pobox.com Eliezer S. Yudkowsky
http://pobox.com/~sentience/AI_design.temp.html
http://pobox.com/~sentience/singul_arity.html
Disclaimer: Unless otherwise specified, I'm not telling you
everything I think I know.