So, to be "fully human" means to be a fit healthy adult or young adult. ??????????????????????


No, to be fully human means to be conscious, or rather capable of consciousness in the near future without special intervention. So a person in a coma or PVS is a borderline case; which of course is recognised both medically and legally. An eally foetus is a equally borderline case. To what extent is a matter open to much reasonable negotiation.

And how much intervention is applicable depends on the medical assessment of the probable outcome. Otherwise we'd put everybody who dies immediately into cryogenic store in the hope that a reversal of their condition will be possible in the future. Costs come into it, and reasonably so, as the living can't be expected to give an open cheque to the possibly- living.