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.

But his overall point is sound

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.”