Page 1485 - Enders_Game_Full_Book

He woke up, breathing heavily, his hand clutching his forehead. He hardly dared to move his hand. Had something been crawling on him?
His hand was empty.
He wanted to go back to sleep, but it was too close to reveille for him to hope for that. He lay there thinking. The nightmare was absurd -- there could not possibly be any Buggers alive here. But something made him afraid. Something was bothering him, and he wasn't sure what.
He thought back to a conversation with one of the technicians who serviced the simulators. Bean's had malfunctioned during practice, so that suddenly the little points of light that represented his ships moving through three-dimensional space were no longer under his control. To his surprise, they didn't just drift on in the direction of the last orders he gave. Instead, they began to swarm, to gather, and then changed color as they shifted to be under someone else's control.
When the technician arrived to replace the chip that had blown, Bean asked him why the ships didn't just stop or keep drifting. "It's part of the simulation," the technician said. "What's being simulated here is not that you're the pilot or even the captain of these ships. You're the admiral, and so inside each ship there's a simulated captain and a simulated pilot, and so when your contact got cut off, they acted the way the real guys would act if they lost contact. See?"
"That seems like a lot of trouble to go to."
"Look, we've had a lot of time to work on these simulators," said the technician. "They're *exactly* like combat."
"Except," said Bean, "the time-lag."
The technician looked blank for a moment. "Oh, right. The time-lag. Well, that just wasn't worth programming in." And then he was gone.
It was that moment of blankness that was bothering Bean. These simulators were as perfect as they could make them, *exactly* like combat, and yet they didn't include the time-lag that came from lightspeed communications. The distances being simulated were large enough that most of the time there should be at least a slight delay between a command and its execution, and sometimes it should be several seconds. But no such delay was programmed in. All communications were being treated as instantaneous. And when Bean asked about it, his question was blown off by the teacher who first trained them on the simulators. "It's a simulation. Plenty of time to get used to the lightspeed delay when you train with the real thing."
That sounded like typically stupid military thinking even at the time, but now Bean realized it was simply a lie. If they programmed in the behavior of pilots and captains when communications were cut off, they could very easily have included the time-lag. The reason these ships were simulated with instantaneous response was because that *was* an accurate simulation of conditions they would meet in combat.