 In any case, not all things are possible in the world of new technologies. Consider, e.g., the legal claim in negligence referred to as wrongful life. The claim there is that medical personnel either (1) have failed properly to advise couples of their risk of producing a child with a serious genetic or chromosomal disorder or of the availability of technologies that would have enabled them to reduce that risk or (2) have failed to implement those technologies effectively. The disorders at issue include Down syndrome, Huntington’s disease and hereditary deafness, and the relevant technologies include preconception genetic testing, in vitro fertilization followed by pre-implantation genetic diagnosis and amniocentesis, which can now be performed as early as the 14th week of pregnancy. Technologies are not yet so advanced that their proper use would have cured the underlying impairment. But their use would have enabled the couple to produce either no child at all or a nonidentical, if (arguably) better off, child instead. At the same time, it seems clear that, in almost all such cases, the impaired child’s life will be (or, at least, can be made to be) unambiguously worth living. It is thus very hard to say in such cases how the negligent act or omission, the act or omission to which the child owes his or her very existence, has harmed, or made things worse for, or otherwise been “bad for,” the child. 