WASHINGTON, D.C.: With a perfunctory nod to the wonders of scientific exploration, President Clinton stuck to his guns, announcing that he would continue the moratorium on federal funding for research into human cloning, while pushing for a legislative ban. That's the advice of his National Biothics Advisory Commission, which keeping the federal ban in place while discouraging (but not making illegal) private research on human embryos. OK, but few scientists are seriously pushing for cloning humans. The hard part? Determining just how far the research on human embryos should go. After all, a lot of folks passionately believe that cloning embryos, but not bringing them to term, is morally no different than assembly-line abortion. Addressing that view will take a far more complex policy discussion.