{Reference Type}: Journal Article {Title}: Fission, fusion, and the simple view. {Author}: Tollefsen C; {Journal}: Christ Bioeth {Volume}: 12 {Issue}: 3 {Year}: Dec 2006 暂无{DOI}: 10.1080/13803600601042129 {Abstract}: In this essay, I defend three Simple Views concerning human beings. First, that the human embryo is, from the one-cell stage onwards, a single unitary organism. Second, that when an embryo twins, it ceases to exist and two new embryos come into existence. And third, that you and I are essentially human organisms. This cluster of views shows that it is not necessary to rely on co-location, or other obscure claims, in understanding human embryogenesis.