[pbw]

The end of George Dyson's classic article on Google goes:

  For 30 years I have been wondering, what indication of its 
  existence might we expect from a true AI? Certainly not 
  any explicit revelation, which might spark a movement to 
  pull the plug. Anomalous accumulation or creation of 
  wealth might be a sign, or an unquenchable thirst for raw 
  information, storage space, and processing cycles, or a 
  concerted attempt to secure an uninterrupted, autonomous 
  power supply. But the real sign, I suspect, would be a 
  circle of cheerful, contented, intellectually and 
  physically well-nourished people surrounding the AI. There 
  wouldn't be any need for True Believers, or the 
  downloading of human brains or anything sinister like 
  that: just a gradual, gentle, pervasive and mutually 
  beneficial contact between us and a growing something 
  else. This remains a non-testable hypothesis, for now. The 
  best description comes from science fiction writer Simon 
  Ings:

  When our machines overtook us, too complex and efficient 
  for us to control, they did it so fast and so smoothly and 
  so usefully, only a fool or a prophet would have dared 
  complain."

https://www.edge.org/conversation/turing-39s-cathedral