Firstly, there is the question of a life insurance policy. I have read accusations that the husband has a policy to the tune of $750,000 that does not pay out until she dies.
This may be untrue, but does not negate the fact that the husband has a REASON to have his wife die, in the form of a fiance and two children. Once she dies, it clears the way for his marriage, and removes the stigma of divorcing a disabled wife.
Secondly, new research shows that "persistent vegetative states" are NOT what they appear to be. Scans done on such patients show that the same parts of the brain that respond in a normal person to things like the voice of a loved one, respond in the brains of people in such states.
As for the amount of brain she has, I assume you know about those cases of people who lived perfectly normal lives with most of their brain missing. In one case, a patient had only a few millimetres of cerebral cortex surrounding a fluid filled hole, but still functioned perfectly well, and was not diagnosed with any problems until after death.
Finally, consider this:
An extensive summary in regard to the clinical criteria for determining human death is found in Defining Death, the report of the President's Commission for the Study of Ethical Problems in Medicine and Biomedical and Behavioral Research. (2) In accord with traditional practice the Commission accepts irreversible cessation of spontaneous cardio-pulmonary function as one clinical criterion for death. But the Commission also maintains that death may be determined if brain function is lacking because the brain integrates the activity of the body. However, in order using brain function as the criterion, the Commission requires cessation "of all functions of the entire brain including the brain stem."
That "brain death" involves more than the higher brain function also was made clear in one of the first scientific seminars to investigate this topic. (3) The seminar participants agreed that "brain death is defined as irreversible destruction of the neuronal contents of the intracranial cavity. This includes both cerebral hemispheres, including cortex and deep structures, as well as the brain stem and the cerebellum. An equivalent term is total brain infarction to the first cervical level of the spinal cord" (p.7).
The President's Commission rejects explicitly the theory that higher brain death alone, that is, absence of function in the cortex with the brain stem retaining its function, would constitute a criterion for human death because:
"First...it is not known which portions of the brain are responsible for cognition and consciousness; what little is known points to substantial interconnections among brainstem, subcortical structures and the neocortex. Thus, the "higher brain" may well exist only as a metaphorical concept, not in reality. Second, even when the sites of certain aspects of consciousness can be found, their cessation often cannot be assessed with the certainty that would be required in applying a statutory definition" (p.40).http://www.op.org/Domcentral/study/kor/87050809.htmSo, would you kill her, knowing that neither you nor the doctors have any idea whether she is really able to comprehend what is happening to her because she is unable to effectively communicate her wishes even if she were able to comprehend?
She is NOT dead, that is clear. By withholding food and water, the doctors are KILLING her. She breathes on her own, her body digests food, and mai ntains all the functions of a living body except for the ability to eat and drink when desired.
Many quadraplegics are the same. Without external help they can't feed themselves and in some case they can't breathe, but because they can communicate we treat them differently. No one would agree to withholding food and water from Christopher Reeves for example.
Nobody knows what is going on in this womans brain, not even the doctors, so what right does anyone have to say that she should be killed?