"It's mostly about recognising patterns and thinking around them. Less tied to intelligence than it is to a way of thinking." And, yes, intelligence too, as well as specific knowledge at times, but still. Most people were just too lazy to think properly. "They are a way to exercise your brain. Like when you..."

He waved his hand vaguely. "Play with your balls." Whatever it was he did. Glancing over at their teacher, he shrugged, then muttered. "Could just let his wife know about the affair."