How do you know that? Because her husband says it!
There are as many experts who say she is not PVS as those who say she is ... again how do you know? Are willing to starve her to death because you think that maybe she is gone? Why is it so important to you that she die?
The doctors told MS three years after her collapse not that it takes much discernment even for a layman. And there are not as many saying something different that is another falsehood.
It is not "important" to me that she die. I just do not equate a body functioning autonomically as real life. What could be worse than lying for years without consciousness?
However establishing the precedent of pouring millions into preserving this semblence of life is a certain method to bankrupt the taxpayer. Why are those normally totally opposed to the welfare state so willing to allow the public coffers be looted in this case?