For Kant, I think it's clear that he meant not biological humans but beings
possessing rationality. In fact, Kant's view of ethical standing has been
used by pro-choice philosophers in the abortion debate to support the
reasonableness of aborting a fetus. A fetus being human (and a human once
developed enough) but not a person.
Max
Max More, Ph.D.
more@extropy.org
http://www.primenet.com/~maxmore
President, Extropy Institute, Editor, Extropy
exi-info@extropy.org, http://www.extropy.org
(310) 398-0375