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You are watching a mouse find its way through a maze to a food treat. The second time you watch the mouse go through the maze, it takes fewer wrong turns than the first time. The third time, it runs straight to the food, with no mistakes. Based on your observations, infer why instinct and learning are both needed for the mouse to run the maze.
The mouse has an instinct to look for food, but it must learn where the food is in the maze.