Since the Tony Bland case in 1993, UK courts have granted permission for food and water to be withdrawn from more than 40 patients in so-called persistent vegetative state, thus causing their deaths.
This year came an application for permission to withdraw food and water from a patient not in persistent vegetative state, but said to be "minimally conscious." The 52-year-old woman, referred to in court as "M" - it is not possible to identify her for legal reasons - was brain damaged by a viral disease in 2003. She is unable to breathe unaided or feed herself.
The application came from her family. Her sister told the Court of Protection "She can't move, she can't speak, she's fed through a tube, she can't even enjoy a cup of tea. She's got no pleasure in life. It's not a life, it's an existence, and I know she wouldn't want it."
Care home staff said M sometimes spoke, smiled and cried tears of emotion.
After a 10-day hearing, Mr Justice Baker this week refused the application. He said the preservation of life remained a fundamental principle of the law.
M did experience pain and discomfort, and her disability severely restricted what she could do, but she did have some positive experiences and there was a reasonable prospect those experiences could be extended. He urged the family to work together with doctors and carers on a revised care plan.
The judge's decision is the right one. Apart from the ethical problems involved in taking a human life, allowing the application would have been another step - and a big step - down the slippery slope towards random euthanasia.