She needs a "functional MRI" or the other type of test (can't recall the name), which shows the actual brain activity in progress, rather than just a still picture of the brain at one instance. If this were done while she was being prompted to react by her parents, it would clearly show whether her apparent reactions were actually the result of activity in the little remaining thinking part of her brain, or just reflexes as some neurologists believe. If there really isn't anything conscious happening up there, then by all means remove the tube and let her go. But it sure would be a lot easier for her parents to accept, if the most sophisticated tests were performed before a decision was made to withdraw sustenance.
Do you really think the MRI would change any minds? I'm sorry I don't. I think the MRI could show 99% of her upper brain to be totally gone, and it wouldn't change the minds of those who're screaming murder.