Bel Iblis gestured to the deck officer, who nodded and got busy. “All right, Leia,” he said, turning back to her. “What’s going on?”
Leia took a deep breath. “It’s the cloning, Garm. I know how Thrawn’s growing them so fast.”
The whole war room had gone dead quiet. “Tell me,” Bel Iblis said.
“It’s the Force,” she told him. It was so obvious – so utterly obvious – and yet she’d missed it completely. “Don’t you see? When you make an exact duplicate of a sentient being, there’s a natural resonance or something set up through the Force between that duplicate and the original. That’s what warps the mind of a clone that’s been grown too fast – there’s not enough time for the mind to adapt to the pressure on it. It can’t adjust; so it breaks.”
“All right,” Bel Iblis said dubiously. “How is Thrawn getting around the problem?”
“It’s very simple,” Leia said, a shiver running through her. “He’s using ysalamiri to block the Force away from the cloning tanks.”
Exchange between Leia Organa Solo and General Garm Bel Iblis in Star Wars: The Last Command by Timothy Zahn