I'm not the one who would. I don't lable people futile, and decide that they don't deserve to live. I take it from your response that you've determined my fil is one of the people who deserves to live? If so, how did you come to this conclusion? If you learned that he has Alzheimer's, would you change your mind?
lable = label
Pardon my lysdexia.
You said he "carries an oxygen tank with him". From that, I assumed he's ambulatory and otherwise lives a normal life.
"If you learned that he has Alzheimer's, would you change your mind?"
It depends. If he has a Living Will that sets certain conditions under which he no longer wishes to live, I would certainly honor that if I were in that position. But since there are many stages of Alzheimer's, I can't make a blanket statement.