She may fall into that certain subset of all living beings that are classified as human. However, she is now in such a state that only the physical shell of a human being is left. I do not see it as a denial of her human right to life to simply allow nature to complete what really started 15 years ago.
I don't have a dog in this hunt, but do you not see how your statement opens up so many doors that it may be impossible to ever close them all?
Ok, so it is by your authority (via elected representatives) that this human being will be killed. I have a problem with that, but as a practical issue what if your assessment of her physical condition is wrong? It is hotly disputed you know.