"It's dubious, yes, but they had the best intentions," said Harry. "They wanted to draw Riddle to them, and save Pettigrew into the bargain, without it looking like that was what they were doing. They wanted Riddle in their space, where they would have the advantage, without him knowing it, without raising suspicions. He would be so mindless of the perceived victory, he'd make mistakes. He always does. It's a fundamental flaw of his. And their plan worked."