"Let her alone," said Docchi. "Let her alone if you don't want to return to the asteroid." No one moved. No one said anything. Minutes passed and the ancient ship creaked and quivered and ran away from the fastest rockets in the system. "I think I can explain it," said Docchi at last, frowning because he couldn't quite. There were things that still eluded him. "Part of the gravity generating plant--in a sense the key component--is an electronic computer, capable of making all the calculations and juggling the proportion of power required to produce directed or undirected gravity continuously. In other words a brain, a complex mechanical intelligence. But it was an ignorant intelligence and it couldn't see why it should perform ad infinitum a complicated and meaningless routine. It couldn't see why and because it couldn't very simply it refused to do so. "It was something like Nona. She's deaf, can't speak, can't communicate in any way. Like it she has a very high potential intelligence and also, in the very same way, she's had difficulty grasping the facts of her environment. Differently though, she does have some contact with people and she has learned something. How much she knows is uncertain but it's far beyond what psychologists credit her with. They just can't measure her type of knowledge." "Yeah," said Jordan dubiously. "I'll agree about Nona. But what is she doing?" "If there were two humans you'd call it telepathy," said Docchi. It upset his concepts too. A machine was a machine--a tool to be used. How could there ever be rapport? "One intelligence is electronic, the other organic. You'll have to dream up your own term because the only thing I can think of is extra sensory perception. It's ridiculous but that's what it is." Jordan smiled and flexed his arms. Under the shapeless garment muscles rippled. "To me it makes sense," he said. "The power was always there but they didn't know what to do with it." The smile broadened. "It couldn't have fallen into better hands. We can use the power, or rather Nona can." "Power?" said Anti, rising majestically. "If you mean by that what it sounds like, I don't care for it. All I want is just enough to take us to Centauri." "You'll get there," said Docchi. "A lot of things seem clearer now. In the past why did the drive work so poorly the further out it got? I don't think anyone investigated this aspect but if they had I'm sure they'd have found that the efficiency was inversely proportional to the square of the distance from the sun. "It's what you'd expect from a deaf, blind, mass sensitive brain, the gravity computer. It wouldn't be aware of the stars. To it the sun would seem the center of the universe and it would no more leave the system than our remote ancestors would think of stepping off the edge of a flat world. "And now that it knows differently the drive ought to work anywhere. With Nona to direct it, even Sirius isn't far."