The document discusses how game designers can make effective decisions when developing games. It notes that the game industry is unpredictable and designers do not have a guaranteed formula for success. It recommends that designers use a combination of their intuition ("gut"), data analysis, and testing to guide their decisions. Designers should leverage their experience, gather player data and behavior metrics, and encourage testing of different design theories with prototypes and experiments. By considering multiple perspectives and validating ideas through a fast iterative process, designers can make better informed choices despite the uncertain nature of game development.