" Harry’s childhood friend Tresko had once explained that the poker player who bases his game on his ability to intuit a bluff is bound to lose. It’s true that we all give ourselves away with superficial mannerisms while lying; however, you have no chance of exposing a good bluffer unless you coldly and calculatedly chart all these mannerisms against each individual, in Tresko’s opinion. "
― Jo Nesbø , The Snowman (Harry Hole, #7)