I believe that Terri's family prooved she could give love and accept love so according to your criteria she should have lived.
You appear to be evaluating "quality of life" FYI- Terri's medical bills were paid by Medicare after her medical malpractice money was all spent on lawyers in order to kill her. Yeah her Meical malpractice money didn't go for her care it went to pay her husband's lawyers to get her killed. Isn't that ironic.
All that is the kind of innuendo I have so far resisted getting involved in.