She looked at the tall young woman, who sat next to the door. Sax understood that they were the senior authorities in the refuge. “Ann left instructions for us not to put her on any kind of life-support mechanism, if she were ever incapacitated like this.”

“No,” Sax said.

“Very explicit instructions. She forbade it. She wrote it down.”

“You put her on whatever it takes to keep her alive,” Sax said, his voice harsh with strain. Everything he had said since Ann’s collapse had been a surprise to him; he was a witness to his actions just as much as they were. He heard himself say, “It doesn’t mean you have to keep her on it, if she doesn’t come around. It’s just a reasonable minimum, to make sure she doesn’t go for nothing.”

The doctor rolled her eyes at this distinction, but the tall woman sitting in the doorway looked thoughtful.

Sax heard himself go on: “I was on life support for some four days, as I understand it, and I’m glad no one decided to turn it off. It’s her decision, not yours. Anyone who wants to die can do it without having to make a doctor compromise her Hippocratic oath.”

The doctor rolled her eyes even more disgustedly than before. But with a glance at her colleague, she began to pull Ann onto the life-support bed; Sax helped her; and then she was turning on the medical AI, and getting Ann out of her walker. A rangy old woman, now breathing with an oxygen mask over her face. The tall woman stood and began to help the doctor, and Sax went and sat down. His own physiological symptoms were amazingly severe, marked chiefly by heat all through him, and a kind of incompetent hyperventilation; and an ache that made him want to cry.

After a time the doctor came over. Ann had fallen into a coma, she said. It looked like a small heart-rhythm abnormality had caused her to faint in the first place. She was stable at the moment.

Sax sat in the room. Much later the doctor returned. Ann’s wristpad had recorded an episode of rapid irregular heartbeat, at the time she fainted. Now there was still a small arrhythmia. And apparently anoxia, or the blow to the head, or both, had initiated a coma.

Sax asked what exactly a coma was, and felt a sinking feeling when the doctor shrugged. It was a catchall term, apparently, for unconscious states of a certain kind. Pupils fixed, body insensitive, and sometimes locked into decorticate postures. Ann’s left arm and leg were twisted. And unconsciousness of course. Sometimes odd vestiges of responsiveness, clenching hands and the like. Duration of coma varied widely. Some people never came out of them.