So it all boils down to a subjective assessment.
Where did that come from?
In January, 2000, Judge Greer conducted a hearing where he was presented with medical evidence by both sides, he heard sworn testimony from both sides, and the cross examinations of that testimony by both sides.
Based on that evidence and testimony, he found that Terri would not have wanted to live the way she was living, and ordered the feeding tube removed.
Since any other judge would have ruled the same, I believe Judge Greer's decision to be an objective assessment of the facts.