YEah if you use meta knowledge, but in game? YEah it is a tactic they used in the later games too XD
The series has three parts, or three separate games. The first is known as "The Lie-Eating Dragon and the Vermilion Vampire" (LiEat I), the second is "The Lie-Eating Dragon and the Azure Dreameater" (LiEat II), and the third and final installment is "The Lie-Eating Dragon and the Gold Thief" (LiEat III). Each game follows a con artist, Teo, who arrives at a town to seek and sell out information he has acquired from previous places. Accompanying him is a young girl named Efina; Efi for short. She is a dragon whose egg suddenly appeared before Teo prior to the events of the series. At each town they visit, they help and sort out problems between the people they meet. Along the way, they obtain information about the existence of dragons - particularly what caused Efina to suddenly appear before Teo.