The belief that machines can keep someone alive indefinitely is simply untrue. My mother had a major aneurysm removed from her heart in 2001. Before my mother went into surgery, she told me "Don't let anybody pull the plug on me." She was conscious and talking a few hours after the surgery, but things started going downhill pretty quickly. Within the day she was on a respirator, started throwing clots, and slowly slipped into a coma, fed through a tube. Her body started shutting down, no digestion noises in her abdomen, signs of gangrene setting into her feet. She lasted three weeks, hooked up to a half dozen machines that were keeping her alive. She finally just died, despite the technology. It was her time. I made sure she got the chance to will herself out of that bed, but she just couldn't do it. I have no regrets about that decision.