Saletan continues the stem cell debate:
...the comments I've received from readers about Obama's stem-cell decision worry me. Many people on both sides seem ill-informed or self-deluded about basic scientific questions. Liberals are denying the simple fact that human embryos are the beginnings of people. Conservatives are pretending that adult stem cells are more powerful than embryonic ones. If ordinary people want to govern science policy, they need to educate themselves so they can govern well.
If we don't draw moral lines against the exploitation of embryos, we may end up obliterating respect for human life generally. But if we're so afraid of that prospect that we refuse to draw lines permitting the use of any embryos under any conditions, we may end up obliterating the moral difference between embryos and full-grown people. Liberals should think seriously about the first scenario. Conservatives should think just as seriously about the second.