Season nine of "South Park", an American animated television series created by Trey Parker and Matt Stone, began airing on March 9, 2005. The ninth season concluded after 14 episodes on December 7, 2005. All of the episodes in the ninth season were written and directed by Trey Parker. Using only the above description and what you know about the world, "Trey Parker wrote every episode in the ninth season of South Park." is definitely correct, incorrect, or inconclusive? 