" Meaning, Wahram thought, that right now somewhere in the system there could be machines in human form, escaped into the crowd, doing their best to stay free, perhaps, when any X-ray machine or other surveillance device would reveal what they were—out there hiding, trying to accomplish the goals they had been given, perhaps, or new ones they might choose for themselves, according to some self-invented algorithm of survival. Damaged, dangerous, detached from any other consciousness, solitary and afraid—in other words, just like everyone else. "
― Kim Stanley Robinson , 2312