Is he so obtuse not to see that he had just made a choice of ethics over science? Yet, unlike President Bush, who painstakingly explained the balance of ethical and scientific goods he was trying to achieve, Obama did not even pretend to make the case why some practices are morally permissible and others not. This is not just intellectual laziness. It is the moral arrogance of a man who continuously dismisses his critics as ideological while he is guided exclusively by pragmatism (in economics, social policy, foreign policy) and science in medical ethics. Science has everything to say about what is possible. Science has nothing to say about what is permissible. Obama's pretense that he will "restore science to its rightful place" and make science, not ideology, dispositive in moral debates is yet more rhetorical sleight of hand -- this time to abdicate decision-making and color his own ideological preferences as authentically "scientific." Dr. James Thomson, the discoverer of embryonic stem cells, said "if human embryonic stem cell research does not make you at least a little bit uncomfortable, you have not thought about it enough." Obama clearly has not.

Obama's address was morally unserious in the extreme. It was populated, as his didactic discourses always are, with a forest of straw men

the ostentatious issuance of a memorandum on "restoring scientific integrity to government decision-making" -- would have made me walk out.

I am not religious. I do not believe that personhood is conferred upon conception. But I also do not believe that a human embryo is the moral equivalent of a hangnail and deserves no more respect than an appendix. Moreover, given the protean power of embryonic manipulation, the temptation it presents to science, and the well-recorded human propensity for evil even in the pursuit of good, lines must be drawn. I suggested the bright line prohibiting the deliberate creation of human embryos solely for the instrumental purpose of research -- a clear violation of the categorical imperative not to make a human life (even if only a potential human life) a means rather than an end.

Bush had restricted federal funding for embryonic stem cell research to cells derived from embryos that had already been destroyed (as of his speech of Aug. 9, 2001). While I favor moving that moral line to additionally permit the use of spare fertility clinic embryos, Obama replaced it with no line at all. He pointedly left open the creation of cloned -- and noncloned sperm-and-egg-derived -- human embryos solely for the purpose of dismemberment and use for parts.

WASHINGTON -- Last week, the White House invited me to a signing ceremony overturning the Bush (43) executive order on stem cell research. I assume this was because I have long argued in these columns and during my five years on the President's Council on Bioethics that, contrary to the Bush policy, federal funding should be extended to research on embryonic stem cell lines derived from discarded embryos in fertility clinics.

Last week, the White House invited me to a signing ceremony overturning the Bush (43) executive order on stem cell research